CppEditor: Clean up cpptoolsreuse.{h,cpp}

A lot of code had a more suitable place to live in, some was even
unused.

Change-Id: I36478ef473aa14395a182c9ac5e3738fc93134b6
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/clangcodemodel/clangdclient.h

@@ -14,7 +14,10 @@
 
 #include <optional>
 
-namespace Core { class SearchResult; }
+namespace Core {
+class HelpItem;
+class SearchResult;
+}
 namespace CppEditor { class CppEditorWidget; }
 namespace LanguageServerProtocol { class Range; }
 namespace ProjectExplorer {

src/plugins/clangcodemodel/clangdlocatorfilters.cpp

@@ -6,6 +6,8 @@
 #include "clangdclient.h"
 #include "clangmodelmanagersupport.h"
 
+#include <coreplugin/editormanager/editormanager.h>
+
 #include <cppeditor/cppeditorconstants.h>
 #include <cppeditor/cppeditortr.h>
 #include <cppeditor/cpplocatorfilter.h>

src/plugins/clangcodemodel/clangtextmark.cpp

@@ -47,7 +47,7 @@ Project *projectForCurrentEditor()
         return nullptr;
 
     if (ProjectPart::ConstPtr projectPart = projectPartForFile(filePath))
-        return projectForProjectPart(*projectPart);
+        return projectPart->project();
 
     return nullptr;
 }
@@ -80,7 +80,7 @@ void disableDiagnosticInCurrentProjectConfig(const ClangDiagnostic &diagnostic)
 
     // Get config
     ClangDiagnosticConfig config = diagnosticConfig();
-    ClangDiagnosticConfigsModel configsModel = CppEditor::diagnosticConfigsModel();
+    ClangDiagnosticConfigsModel configsModel = ClangdSettings::diagnosticConfigsModel();
 
     // Create copy if needed
     if (config.isReadOnly()) {

src/plugins/clangcodemodel/clangutils.cpp

@@ -5,6 +5,7 @@
 
 #include "clangcodemodeltr.h"
 
+#include <coreplugin/editormanager/editormanager.h>
 #include <coreplugin/icore.h>
 #include <coreplugin/idocument.h>
 #include <cppeditor/baseeditordocumentparser.h>