[mlir][xegpu] Fix bazel build failure (#128595)

Removes unnecessary headers creating wrong dependencies.

Author: charithaintc

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

@@ -8,13 +8,8 @@
 
 #include "mlir/Dialect/XeGPU/IR/XeGPU.h"
 #include "mlir/IR/Builders.h"
-#include "mlir/IR/BuiltinTypes.h"
 #include "mlir/IR/DialectImplementation.h"
-#include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/TypeSwitch.h"
-#include "llvm/Support/Casting.h"
-#include "llvm/Support/LogicalResult.h"
-#include <cassert>
 
 namespace mlir {
 namespace xegpu {

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

@@ -10,13 +10,9 @@
 #include "mlir/Dialect/Utils/StaticValueUtils.h"
 #include "mlir/Dialect/XeGPU/IR/XeGPU.h"
 #include "mlir/IR/Builders.h"
-#include "mlir/IR/BuiltinTypes.h"
-#include "mlir/IR/Diagnostics.h"
 #include "mlir/IR/TypeUtilities.h"
-#include "mlir/Support/LLVM.h"
 
 #include "llvm/Support/Debug.h"
-#include "llvm/Support/LogicalResult.h"
 
 #define DEBUG_TYPE "xegpu"