[Parse] Remove unused includes (NFC) (#141524)

These are identified by misc-include-cleaner.  I've filtered out those
that break builds.  Also, I'm staying away from llvm-config.h,
config.h, and Compiler.h, which likely cause platform- or
compiler-specific build failures.

Author: kazutakahirata

clang/lib/Parse/ParseAST.cpp

@@ -15,7 +15,6 @@
 #include "clang/AST/ASTContext.h"
 #include "clang/AST/ExternalASTSource.h"
 #include "clang/AST/Stmt.h"
-#include "clang/Basic/DiagnosticParse.h"
 #include "clang/Parse/Parser.h"
 #include "clang/Sema/CodeCompleteConsumer.h"
 #include "clang/Sema/EnterExpressionEvaluationContext.h"

clang/lib/Parse/ParseDecl.cpp

@@ -29,12 +29,9 @@
 #include "clang/Sema/Scope.h"
 #include "clang/Sema/SemaCUDA.h"
 #include "clang/Sema/SemaCodeCompletion.h"
-#include "clang/Sema/SemaDiagnostic.h"
 #include "clang/Sema/SemaObjC.h"
 #include "clang/Sema/SemaOpenMP.h"
-#include "llvm/ADT/STLForwardCompat.h"
 #include "llvm/ADT/SmallSet.h"
-#include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/StringSwitch.h"
 #include <optional>
 

clang/lib/Parse/ParseDeclCXX.cpp

@@ -17,7 +17,6 @@
 #include "clang/Basic/Attributes.h"
 #include "clang/Basic/CharInfo.h"
 #include "clang/Basic/DiagnosticParse.h"
-#include "clang/Basic/OperatorKinds.h"
 #include "clang/Basic/TargetInfo.h"
 #include "clang/Basic/TokenKinds.h"
 #include "clang/Lex/LiteralSupport.h"
@@ -30,7 +29,6 @@
 #include "clang/Sema/ParsedTemplate.h"
 #include "clang/Sema/Scope.h"
 #include "clang/Sema/SemaCodeCompletion.h"
-#include "llvm/ADT/SmallString.h"
 #include "llvm/Support/TimeProfiler.h"
 #include <optional>
 

clang/lib/Parse/ParseHLSLRootSignature.cpp

@@ -10,8 +10,6 @@
 
 #include "clang/Lex/LiteralSupport.h"
 
-#include "llvm/Support/raw_ostream.h"
-
 using namespace llvm::hlsl::rootsig;
 
 namespace clang {

clang/lib/Parse/ParseInit.cpp

@@ -20,8 +20,6 @@
 #include "clang/Sema/Scope.h"
 #include "clang/Sema/SemaCodeCompletion.h"
 #include "clang/Sema/SemaObjC.h"
-#include "llvm/ADT/STLExtras.h"
-#include "llvm/ADT/SmallString.h"
 using namespace clang;
 
 bool Parser::MayBeDesignationStart() {

clang/lib/Parse/ParseObjc.cpp

@@ -25,7 +25,6 @@
 #include "clang/Sema/SemaObjC.h"
 #include "llvm/ADT/STLForwardCompat.h"
 #include "llvm/ADT/SmallVector.h"
-#include "llvm/ADT/StringExtras.h"
 
 using namespace clang;
 

clang/lib/Parse/ParseOpenMP.cpp

@@ -12,7 +12,6 @@
 
 #include "clang/AST/ASTContext.h"
 #include "clang/AST/OpenMPClause.h"
-#include "clang/AST/StmtOpenMP.h"
 #include "clang/Basic/DiagnosticParse.h"
 #include "clang/Basic/OpenMPKinds.h"
 #include "clang/Basic/TargetInfo.h"

clang/lib/Parse/ParseStmtAsm.cpp

@@ -15,7 +15,6 @@
 #include "clang/Basic/TargetInfo.h"
 #include "clang/Parse/Parser.h"
 #include "clang/Parse/RAIIObjectsForParser.h"
-#include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/MC/MCAsmInfo.h"
 #include "llvm/MC/MCContext.h"
@@ -30,7 +29,6 @@
 #include "llvm/MC/MCTargetOptions.h"
 #include "llvm/MC/TargetRegistry.h"
 #include "llvm/Support/SourceMgr.h"
-#include "llvm/Support/TargetSelect.h"
 using namespace clang;
 
 namespace {

clang/lib/Parse/ParseTemplate.cpp

@@ -20,8 +20,6 @@
 #include "clang/Sema/EnterExpressionEvaluationContext.h"
 #include "clang/Sema/ParsedTemplate.h"
 #include "clang/Sema/Scope.h"
-#include "clang/Sema/SemaDiagnostic.h"
-#include "llvm/Support/TimeProfiler.h"
 using namespace clang;
 
 unsigned Parser::ReenterTemplateScopes(MultiParseScope &S, Decl *D) {

clang/lib/Parse/ParseTentative.cpp

@@ -11,7 +11,6 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "clang/Basic/DiagnosticParse.h"
 #include "clang/Parse/Parser.h"
 #include "clang/Sema/ParsedTemplate.h"
 using namespace clang;