Reapply "clean up"

This reverts commit e6865a7.

Author: joaosaffran

llvm/include/llvm/BinaryFormat/DXContainer.h

@@ -55,7 +55,7 @@ enum class HashFlags : uint32_t {
 };
 
 struct ShaderHash {
-  uint32_t Flags; // HashFlags
+  uint32_t Flags; // dxbc::HashFlags
   uint8_t Digest[16];
 
   bool isPopulated();

llvm/include/llvm/MC/DXContainerRootSignature.h

@@ -7,7 +7,6 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/BinaryFormat/DXContainer.h"
-#include "llvm/Support/ErrorHandling.h"
 #include <cstdint>
 #include <limits>
 

llvm/include/llvm/Object/DXContainer.h

@@ -23,9 +23,6 @@
 #include "llvm/Support/MemoryBufferRef.h"
 #include "llvm/TargetParser/Triple.h"
 #include <array>
-#include <cstddef>
-#include <cstdint>
-#include <memory>
 #include <variant>
 
 namespace llvm {

llvm/lib/MC/DXContainerRootSignature.cpp

@@ -8,7 +8,6 @@
 
 #include "llvm/MC/DXContainerRootSignature.h"
 #include "llvm/ADT/SmallString.h"
-#include "llvm/BinaryFormat/DXContainer.h"
 #include "llvm/Support/EndianStream.h"
 
 using namespace llvm;

llvm/lib/Object/DXContainer.cpp

@@ -11,9 +11,7 @@
 #include "llvm/Object/Error.h"
 #include "llvm/Support/Alignment.h"
 #include "llvm/Support/Endian.h"
-#include "llvm/Support/Error.h"
 #include "llvm/Support/FormatVariadic.h"
-#include <cstdint>
 
 using namespace llvm;
 using namespace llvm::object;

llvm/lib/ObjectYAML/DXContainerYAML.cpp

@@ -14,9 +14,6 @@
 #include "llvm/ObjectYAML/DXContainerYAML.h"
 #include "llvm/ADT/ScopeExit.h"
 #include "llvm/BinaryFormat/DXContainer.h"
-#include "llvm/Object/DXContainer.h"
-#include "llvm/Support/Casting.h"
-#include "llvm/Support/Error.h"
 #include "llvm/Support/ScopedPrinter.h"
 
 namespace llvm {

llvm/unittests/Object/DXContainerTest.cpp

@@ -8,12 +8,9 @@
 
 #include "llvm/Object/DXContainer.h"
 #include "llvm/ADT/StringRef.h"
-#include "llvm/BinaryFormat/DXContainer.h"
 #include "llvm/BinaryFormat/Magic.h"
 #include "llvm/ObjectYAML/DXContainerYAML.h"
 #include "llvm/ObjectYAML/yaml2obj.h"
-#include "llvm/Support/Casting.h"
-#include "llvm/Support/Error.h"
 #include "llvm/Support/MemoryBufferRef.h"
 #include "llvm/Testing/Support/Error.h"
 #include "gtest/gtest.h"