standardize spatial and pim dialects

remove old unused stuff

src/PIM/Common/PimCommon.hpp

@@ -6,13 +6,11 @@
 #include "mlir/IR/PatternMatch.h"
 #include "mlir/IR/Value.h"
 
-#include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringRef.h"
 
 #include "src/Compiler/CompilerOptions.hpp"
 
-const llvm::StringRef PimConstantShouldAllocateAttrName = "pim.constant.should_allocate";
 inline constexpr llvm::StringRef PimWeightAlwaysAttrName = "weightAlways";
 
 namespace onnx_mlir {