Clang: Remove PchManager

...which is the last dependency to libclang from the plugin.

Change-Id: I173ee7e9621912ec88706b4cf62db2b1dbcf7610
Reviewed-by: Marco Bubke <marco.bubke@theqtcompany.com>
Reviewed-by: Nikolai Kosjar <nikolai.kosjar@theqtcompany.com>

src/plugins/clangcodemodel/clangcodemodel.qbs

@@ -23,16 +23,10 @@ QtcPlugin {
     property string llvmConfig: Clang.llvmConfig(qbs, QtcFunctions, QtcProcessOutputReader)
     property string llvmIncludeDir: Clang.includeDir(llvmConfig, QtcProcessOutputReader)
     property string llvmLibDir: Clang.libDir(llvmConfig, QtcProcessOutputReader)
-    property string llvmLibs: Clang.libraries(qbs.targetOS)
     property string llvmVersion: Clang.version(llvmConfig, QtcProcessOutputReader)
 
     condition: llvmConfig && File.exists(llvmIncludeDir.concat("/clang-c/Index.h"))
 
-    cpp.includePaths: base.concat(llvmIncludeDir)
-    cpp.libraryPaths: base.concat(llvmLibDir)
-    cpp.rpaths: cpp.libraryPaths
-    cpp.dynamicLibraries: base.concat(llvmLibs)
-
     cpp.defines: {
         var defines = base;
         // The following defines are used to determine the clang include path for intrinsics.
@@ -95,16 +89,6 @@ QtcPlugin {
         "constants.h",
         "highlightingmarksreporter.cpp",
         "highlightingmarksreporter.h",
-        "pchinfo.cpp",
-        "pchinfo.h",
-        "pchmanager.cpp",
-        "pchmanager.h",
-        "raii/scopedclangoptions.cpp",
-        "raii/scopedclangoptions.h",
-        "unit.cpp",
-        "unit.h",
-        "unsavedfiledata.cpp",
-        "unsavedfiledata.h",
     ]
 
     Group {