[SYCL][ESIMD] Don't override target triple to genx64 (#13445)

We don't need it anymore and it causes a warning on the new `spirv64`
target.

I found this working on thinLTO.

Signed-off-by: Sarnie, Nick <[email protected]>

Author: sarnex

llvm/lib/SYCLLowerIR/ESIMD/LowerESIMD.cpp

@@ -1513,12 +1513,6 @@ void generateKernelMetadata(Module &M) {
   LLVMContext &Ctx = M.getContext();
   Type *I32Ty = Type::getInt32Ty(Ctx);
 
-  std::string TargetTriple = M.getTargetTriple();
-  llvm::Triple T(TargetTriple);
-  T.setArchName("genx64");
-  TargetTriple = T.str();
-  M.setTargetTriple(TargetTriple);
-
   enum { AK_NORMAL, AK_SAMPLER, AK_SURFACE, AK_VME };
   enum { IK_NORMAL, IK_INPUT, IK_OUTPUT, IK_INPUT_OUTPUT };