[AST] Remove unused includes (NFC) (#141417)

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/AST/ByteCode/Disasm.cpp

@@ -28,7 +28,6 @@
 #include "clang/AST/DeclCXX.h"
 #include "clang/AST/ExprCXX.h"
 #include "llvm/Support/Compiler.h"
-#include "llvm/Support/Format.h"
 
 using namespace clang;
 using namespace clang::interp;

clang/lib/AST/ByteCode/Function.cpp

@@ -10,7 +10,6 @@
 #include "Program.h"
 #include "clang/AST/Decl.h"
 #include "clang/AST/DeclCXX.h"
-#include "clang/Basic/Builtins.h"
 
 using namespace clang;
 using namespace clang::interp;

clang/lib/AST/CXXInheritance.cpp

@@ -27,7 +27,6 @@
 #include <algorithm>
 #include <cassert>
 #include <utility>
-#include <vector>
 
 using namespace clang;
 

clang/lib/AST/DeclTemplate.cpp

@@ -33,7 +33,6 @@
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/Support/ErrorHandling.h"
 #include <cassert>
-#include <memory>
 #include <optional>
 #include <utility>
 

clang/lib/AST/JSONNodeDumper.cpp

@@ -4,7 +4,6 @@
 #include "clang/Basic/Specifiers.h"
 #include "clang/Lex/Lexer.h"
 #include "llvm/ADT/StringExtras.h"
-#include <optional>
 
 using namespace clang;
 

clang/lib/AST/StmtPrinter.cpp

@@ -50,7 +50,6 @@
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/StringRef.h"
-#include "llvm/Support/Casting.h"
 #include "llvm/Support/Compiler.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/raw_ostream.h"

clang/lib/AST/TemplateBase.cpp

@@ -37,7 +37,6 @@
 #include <cstddef>
 #include <cstdint>
 #include <cstring>
-#include <optional>
 
 using namespace clang;