ClangCodeModel: Update build system files

There is no compile-time dependency to libclang anymore.

Change-Id: I3b07977ba037a9c39c54d95c39f0505ae934cb02
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/clangcodemodel/CMakeLists.txt

@@ -1,18 +1,13 @@
-set(CLANG_VERSION ${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}.${LLVM_VERSION_PATCH})
-
 set(TEST_LINK_DEPENDS)
 if(WITH_TESTS)
   set(TEST_LINK_DEPENDS QtSupport)
 endif()
 
 add_qtc_plugin(ClangCodeModel
-  CONDITION TARGET libclang
   DEPENDS CPlusPlus
   PLUGIN_DEPENDS Core CppEditor LanguageClient ${TEST_LINK_DEPENDS} TextEditor
   PLUGIN_TEST_DEPENDS QmakeProjectManager
   DEFINES
-    CLANG_VERSION="${CLANG_VERSION}"
-    CLANG_INCLUDE_DIR="${LLVM_LIBRARY_DIR}/clang/${CLANG_VERSION}/include"
     CLANG_BINDIR="${LLVM_TOOLS_BINARY_DIR}"
   SOURCES
     clangactivationsequencecontextprocessor.cpp clangactivationsequencecontextprocessor.h

src/plugins/clangcodemodel/clangcodemodel.qbs

@@ -14,15 +14,12 @@ QtcPlugin {
     Depends { name: "TextEditor" }
     Depends { name: "Utils" }
 
-    Depends { name: "libclang"; required: false }
     Depends { name: "clang_defines" }
 
     pluginTestDepends: [
         "QmakeProjectManager",
     ]
 
-    condition: libclang.present
-
     files: [
         "clangactivationsequencecontextprocessor.cpp",
         "clangactivationsequencecontextprocessor.h",