Remove workaround -Wno-error=implicit-int

Previously, some workloads used implicit int types in function
definitions. With LLVM 15, implicit ints are treated as errors.
The workaround to disable this error has now been removed, so IGC
enforces the same behavior as LLVM 15 and treats implicit ints
as errors.

Author: KanclerzPiotr

IGC/OCLFE/igd_fcl_mcl/source/clang_tb.cpp

@@ -1353,9 +1353,6 @@ bool CClangTranslationBlock::TranslateClang(const TranslateClangArgs *pInputArgs
     optionsEx += " -U__IMAGE_SUPPORT__";
   }
 
-  // TODO: Workaround - remove after some time to be consistent with LLVM15+ behavior
-  optionsEx += " -Wno-error=implicit-int";
-
   IOCLFEBinaryResult *pResultPtr = NULL;
   int res = 0;
   {