CMakePM: Remove the CMake introspection after CMake project load

Will be done in the CMake editor. No need to slow the project loading
when you don't do any editing of CMake files.

Initially I wanted to have it already loaded when code completion is
done, but doing once when a CMake editor is opened is better.

Change-Id: I1eda2a64e708bfa4fab5ab749059a08769800eba
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>

src/plugins/cmakeprojectmanager/cmakebuildsystem.cpp

@@ -1283,10 +1283,6 @@ void CMakeBuildSystem::setupCMakeSymbolsHash()
                 m_projectKeywords.functions << QString::fromUtf8(arg.Value);
         }
     }
-
-    // Code completion setup
-    if (CMakeTool *tool = CMakeKitAspect::cmakeTool(target()->kit()))
-        tool->keywords();
 }
 
 void CMakeBuildSystem::ensureBuildDirectory(const BuildDirParameters &parameters)