diff --git a/src/plugins/glsleditor/CMakeLists.txt b/src/plugins/glsleditor/CMakeLists.txt
index b02e95cda74..494c27479b5 100644
--- a/src/plugins/glsleditor/CMakeLists.txt
+++ b/src/plugins/glsleditor/CMakeLists.txt
@@ -8,7 +8,7 @@ add_qtc_plugin(GLSLEditor
     glsleditor.cpp glsleditor.h
     glsleditor.qrc
     glsleditorconstants.h
-    glsleditorplugin.cpp glsleditorplugin.h
+    glsleditorplugin.cpp
     glsleditortr.h
     glslhighlighter.cpp glslhighlighter.h
     glslindenter.cpp glslindenter.h
diff --git a/src/plugins/glsleditor/glslcompletionassist.cpp b/src/plugins/glsleditor/glslcompletionassist.cpp
index bb72ba9de30..d38b105f997 100644
--- a/src/plugins/glsleditor/glslcompletionassist.cpp
+++ b/src/plugins/glsleditor/glslcompletionassist.cpp
@@ -2,8 +2,6 @@
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
 
 #include "glslcompletionassist.h"
-#include "glsleditorconstants.h"
-#include "glsleditorplugin.h"
 
 #include <glsl/glslengine.h>
 #include <glsl/glsllexer.h>
diff --git a/src/plugins/glsleditor/glsleditor.cpp b/src/plugins/glsleditor/glsleditor.cpp
index 0ccd6f30836..1b789863497 100644
--- a/src/plugins/glsleditor/glsleditor.cpp
+++ b/src/plugins/glsleditor/glsleditor.cpp
@@ -3,7 +3,6 @@
 
 #include "glsleditor.h"
 #include "glsleditorconstants.h"
-#include "glsleditorplugin.h"
 #include "glslhighlighter.h"
 #include "glslautocompleter.h"
 #include "glslcompletionassist.h"
@@ -105,6 +104,93 @@ enum {
     UPDATE_DOCUMENT_DEFAULT_INTERVAL = 150
 };
 
+class InitFile final
+{
+public:
+    explicit InitFile(const QString &fileName) : m_fileName(fileName) {}
+
+    ~InitFile() { delete m_engine; }
+
+    GLSL::Engine *engine() const
+    {
+        if (!m_engine)
+            initialize();
+        return m_engine;
+    }
+
+    GLSL::TranslationUnitAST *ast() const
+    {
+        if (!m_ast)
+            initialize();
+        return m_ast;
+    }
+
+private:
+    void initialize() const
+    {
+        // Parse the builtins for any language variant so we can use all keywords.
+        const int variant = GLSL::Lexer::Variant_All;
+
+        QByteArray code;
+        QFile file(Core::ICore::resourcePath("glsl").pathAppended(m_fileName).toString());
+        if (file.open(QFile::ReadOnly))
+            code = file.readAll();
+
+        m_engine = new GLSL::Engine();
+        GLSL::Parser parser(m_engine, code.constData(), code.size(), variant);
+        m_ast = parser.parse();
+    }
+
+    QString m_fileName;
+    mutable GLSL::Engine *m_engine = nullptr;
+    mutable GLSL::TranslationUnitAST *m_ast = nullptr;
+};
+
+static const InitFile *fragmentShaderInit(int variant)
+{
+    static InitFile glsl_es_100_frag{"glsl_es_100.frag"};
+    static InitFile glsl_120_frag{"glsl_120.frag"};
+    static InitFile glsl_330_frag{"glsl_330.frag"};
+
+    if (variant & GLSL::Lexer::Variant_GLSL_400)
+        return &glsl_330_frag;
+
+    if (variant & GLSL::Lexer::Variant_GLSL_120)
+        return  &glsl_120_frag;
+
+    return &glsl_es_100_frag;
+}
+
+static const InitFile *vertexShaderInit(int variant)
+{
+    static InitFile glsl_es_100_vert{"glsl_es_100.vert"};
+    static InitFile glsl_120_vert{"glsl_120.vert"};
+    static InitFile glsl_330_vert{"glsl_330.vert"};
+
+    if (variant & GLSL::Lexer::Variant_GLSL_400)
+        return &glsl_330_vert;
+
+    if (variant & GLSL::Lexer::Variant_GLSL_120)
+        return &glsl_120_vert;
+
+    return &glsl_es_100_vert;
+}
+
+static const InitFile *shaderInit(int variant)
+{
+    static InitFile glsl_es_100_common{"glsl_es_100_common.glsl"};
+    static InitFile glsl_120_common{"glsl_120_common.glsl"};
+    static InitFile glsl_330_common{"glsl_330_common.glsl"};
+
+    if (variant & GLSL::Lexer::Variant_GLSL_400)
+        return &glsl_330_common;
+
+    if (variant & GLSL::Lexer::Variant_GLSL_120)
+        return &glsl_120_common;
+
+    return &glsl_es_100_common;
+}
+
 class CreateRanges: protected Visitor
 {
     QTextDocument *textDocument;
diff --git a/src/plugins/glsleditor/glsleditor.qbs b/src/plugins/glsleditor/glsleditor.qbs
index e0aefe02a1b..9c1847cce67 100644
--- a/src/plugins/glsleditor/glsleditor.qbs
+++ b/src/plugins/glsleditor/glsleditor.qbs
@@ -22,7 +22,6 @@ QtcPlugin {
         "glsleditor.qrc",
         "glsleditorconstants.h",
         "glsleditorplugin.cpp",
-        "glsleditorplugin.h",
         "glsleditortr.h",
         "glslhighlighter.cpp",
         "glslhighlighter.h",
diff --git a/src/plugins/glsleditor/glsleditorplugin.cpp b/src/plugins/glsleditor/glsleditorplugin.cpp
index ac255fe7089..fcfc999af23 100644
--- a/src/plugins/glsleditor/glsleditorplugin.cpp
+++ b/src/plugins/glsleditor/glsleditorplugin.cpp
@@ -1,17 +1,11 @@
 // Copyright (C) 2016 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
 
-#include "glsleditorplugin.h"
-
 #include "glslcompletionassist.h"
 #include "glsleditor.h"
 #include "glsleditorconstants.h"
 #include "glsleditortr.h"
 
-#include <glsl/glslengine.h>
-#include <glsl/glslparser.h>
-#include <glsl/glsllexer.h>
-
 #include <coreplugin/actionmanager/actioncontainer.h>
 #include <coreplugin/actionmanager/actionmanager.h>
 #include <coreplugin/actionmanager/command.h>
@@ -41,89 +35,6 @@ public:
 
 static GlslEditorPluginPrivate *dd = nullptr;
 
-InitFile::InitFile(const QString &fileName)
-    : m_fileName(fileName)
-{}
-
-InitFile::~InitFile()
-{
-    delete m_engine;
-}
-
-void InitFile::initialize() const
-{
-    // Parse the builtins for any language variant so we can use all keywords.
-    const int variant = GLSL::Lexer::Variant_All;
-
-    QByteArray code;
-    QFile file(ICore::resourcePath("glsl").pathAppended(m_fileName).toString());
-    if (file.open(QFile::ReadOnly))
-        code = file.readAll();
-
-    m_engine = new GLSL::Engine();
-    GLSL::Parser parser(m_engine, code.constData(), code.size(), variant);
-    m_ast = parser.parse();
-}
-
-GLSL::TranslationUnitAST *InitFile::ast() const
-{
-    if (!m_ast)
-        initialize();
-    return m_ast;
-}
-
-GLSL::Engine *InitFile::engine() const
-{
-    if (!m_engine)
-        initialize();
-    return m_engine;
-}
-
-const InitFile *fragmentShaderInit(int variant)
-{
-    static InitFile glsl_es_100_frag{"glsl_es_100.frag"};
-    static InitFile glsl_120_frag{"glsl_120.frag"};
-    static InitFile glsl_330_frag{"glsl_330.frag"};
-
-    if (variant & GLSL::Lexer::Variant_GLSL_400)
-        return &glsl_330_frag;
-
-    if (variant & GLSL::Lexer::Variant_GLSL_120)
-        return  &glsl_120_frag;
-
-    return &glsl_es_100_frag;
-}
-
-const InitFile *vertexShaderInit(int variant)
-{
-    static InitFile glsl_es_100_vert{"glsl_es_100.vert"};
-    static InitFile glsl_120_vert{"glsl_120.vert"};
-    static InitFile glsl_330_vert{"glsl_330.vert"};
-
-    if (variant & GLSL::Lexer::Variant_GLSL_400)
-        return &glsl_330_vert;
-
-    if (variant & GLSL::Lexer::Variant_GLSL_120)
-        return &glsl_120_vert;
-
-    return &glsl_es_100_vert;
-}
-
-const InitFile *shaderInit(int variant)
-{
-    static InitFile glsl_es_100_common{"glsl_es_100_common.glsl"};
-    static InitFile glsl_120_common{"glsl_120_common.glsl"};
-    static InitFile glsl_330_common{"glsl_330_common.glsl"};
-
-    if (variant & GLSL::Lexer::Variant_GLSL_400)
-        return &glsl_330_common;
-
-    if (variant & GLSL::Lexer::Variant_GLSL_120)
-        return &glsl_120_common;
-
-    return &glsl_es_100_common;
-}
-
 class GlslEditorPlugin final : public ExtensionSystem::IPlugin
 {
     Q_OBJECT
diff --git a/src/plugins/glsleditor/glsleditorplugin.h b/src/plugins/glsleditor/glsleditorplugin.h
deleted file mode 100644
index a442db1128a..00000000000
--- a/src/plugins/glsleditor/glsleditorplugin.h
+++ /dev/null
@@ -1,33 +0,0 @@
-// Copyright (C) 2016 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
-
-#pragma once
-
-#include <QString>
-
-#include <glsl/glsl.h>
-
-namespace GlslEditor::Internal {
-
-class InitFile
-{
-public:
-    explicit InitFile(const QString &m_fileName);
-    ~InitFile();
-
-    GLSL::Engine *engine() const;
-    GLSL::TranslationUnitAST *ast() const;
-
-private:
-    void initialize() const;
-
-    QString m_fileName;
-    mutable GLSL::Engine *m_engine = nullptr;
-    mutable GLSL::TranslationUnitAST *m_ast = nullptr;
-};
-
-const InitFile *fragmentShaderInit(int variant);
-const InitFile *vertexShaderInit(int variant);
-const InitFile *shaderInit(int variant);
-
-} // GlslEditor