ClangCodeModel: Remove ClangModelManagerSupport::instance()

Not needed.

Change-Id: I46ee3a493ddb59c4b5f0e3eb4443d7f348a6b074
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/clangcodemodel/clangdsemantichighlighting.cpp

@@ -32,6 +32,7 @@
 #include "tasktimers.h"
 
 #include <cppeditor/semantichighlighter.h>
+#include <languageclient/languageclientmanager.h>
 #include <languageclient/semantichighlightsupport.h>
 #include <languageserverprotocol/lsptypes.h>
 #include <texteditor/blockrange.h>
@@ -381,7 +382,7 @@ void doSemanticHighlighting(
             const Position startPos(r.line - 1, r.column - 1);
             virtualRanges << Range(startPos, startPos.withOffset(r.length, &doc));
         }
-        QMetaObject::invokeMethod(ClangModelManagerSupport::instance(),
+        QMetaObject::invokeMethod(LanguageClientManager::instance(),
                                   [filePath, virtualRanges, docRevision] {
             if (ClangdClient * const client = ClangModelManagerSupport::clientForFile(filePath))
                 client->setVirtualRanges(filePath, virtualRanges, docRevision);

src/plugins/clangcodemodel/clangmodelmanagersupport.cpp

@@ -79,8 +79,6 @@ using namespace LanguageClient;
 namespace ClangCodeModel {
 namespace Internal {
 
-static ClangModelManagerSupport *m_instance = nullptr;
-
 static CppEditor::CppModelManager *cppModelManager()
 {
     return CppEditor::CppModelManager::instance();
@@ -162,9 +160,6 @@ static void checkSystemForClangdSuitability()
 
 ClangModelManagerSupport::ClangModelManagerSupport()
 {
-    QTC_CHECK(!m_instance);
-    m_instance = this;
-
     watchForExternalChanges();
     watchForInternalChanges();
     setupClangdConfigFile();
@@ -214,7 +209,6 @@ ClangModelManagerSupport::ClangModelManagerSupport()
 ClangModelManagerSupport::~ClangModelManagerSupport()
 {
     m_generatorSynchronizer.waitForFinished();
-    m_instance = nullptr;
 }
 
 void ClangModelManagerSupport::followSymbol(const CppEditor::CursorInEditor &data,
@@ -806,10 +800,5 @@ void ClangModelManagerSupport::reinitializeBackendDocuments(const QStringList &p
     }
 }
 
-ClangModelManagerSupport *ClangModelManagerSupport::instance()
-{
-    return m_instance;
-}
-
 } // Internal
 } // ClangCodeModel

src/plugins/clangcodemodel/clangmodelmanagersupport.h

@@ -52,7 +52,7 @@ namespace Internal {
 
 class ClangdClient;
 
-class ClangModelManagerSupport:
+class ClangModelManagerSupport :
         public QObject,
         public CppEditor::ModelManagerSupport
 {
@@ -69,8 +69,6 @@ public:
     static ClangdClient *clientForProject(const ProjectExplorer::Project *project);
     static ClangdClient *clientForFile(const Utils::FilePath &file);
 
-    static ClangModelManagerSupport *instance();
-
 private:
     void followSymbol(const CppEditor::CursorInEditor &data,
                       const Utils::LinkHandler &processLinkCallback, bool resolveTarget,