remove header

Author: charithaintc

mlir/lib/Dialect/XeGPU/IR/XeGPUDialect.cpp

@@ -14,7 +14,6 @@
 #include "mlir/Dialect/XeGPU/IR/XeGPUTargetInfo.h"
 #include "mlir/IR/Builders.h"
 #include "mlir/IR/DialectImplementation.h"
-#include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/TypeSwitch.h"
 #include "llvm/Support/Debug.h"