[Index] Remove unused includes (NFC)

[kazutakahirata]

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.

[llvmbot]

@llvm/pr-subscribers-clang

Author: Kazu Hirata (kazutakahirata)

Changes

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.

---

Full diff: https://github.com/llvm/llvm-project/pull/142525.diff

4 Files Affected:

• (modified) clang/lib/Index/CommentToXML.cpp (-1)
• (modified) clang/lib/Index/FileIndexRecord.cpp (-2)
• (modified) clang/lib/Index/IndexingAction.cpp (-2)
• (modified) clang/lib/Index/USRGeneration.cpp (-1)

diff --git a/clang/lib/Index/CommentToXML.cpp b/clang/lib/Index/CommentToXML.cpp
index cd7226e71171c..672386171ecf6 100644
--- a/clang/lib/Index/CommentToXML.cpp
+++ b/clang/lib/Index/CommentToXML.cpp
@@ -11,7 +11,6 @@
 #include "clang/AST/Attr.h"
 #include "clang/AST/Comment.h"
 #include "clang/AST/CommentVisitor.h"
-#include "clang/Basic/FileManager.h"
 #include "clang/Basic/IdentifierTable.h"
 #include "clang/Basic/SourceManager.h"
 #include "clang/Format/Format.h"
diff --git a/clang/lib/Index/FileIndexRecord.cpp b/clang/lib/Index/FileIndexRecord.cpp
index cf40a596f5094..d6b0ee5c4ff10 100644
--- a/clang/lib/Index/FileIndexRecord.cpp
+++ b/clang/lib/Index/FileIndexRecord.cpp
@@ -7,10 +7,8 @@
 //===----------------------------------------------------------------------===//
 
 #include "FileIndexRecord.h"
-#include "clang/AST/ASTContext.h"
 #include "clang/AST/DeclTemplate.h"
 #include "clang/Basic/SourceManager.h"
-#include "llvm/ADT/SmallString.h"
 #include "llvm/Support/Path.h"
 
 using namespace clang;
diff --git a/clang/lib/Index/IndexingAction.cpp b/clang/lib/Index/IndexingAction.cpp
index 81c46a0d08de6..73a6a8c62af2e 100644
--- a/clang/lib/Index/IndexingAction.cpp
+++ b/clang/lib/Index/IndexingAction.cpp
@@ -10,12 +10,10 @@
 #include "IndexingContext.h"
 #include "clang/Frontend/CompilerInstance.h"
 #include "clang/Frontend/FrontendAction.h"
-#include "clang/Frontend/MultiplexConsumer.h"
 #include "clang/Index/IndexDataConsumer.h"
 #include "clang/Lex/PPCallbacks.h"
 #include "clang/Lex/Preprocessor.h"
 #include "clang/Serialization/ASTReader.h"
-#include "llvm/ADT/STLExtras.h"
 #include <memory>
 
 using namespace clang;
diff --git a/clang/lib/Index/USRGeneration.cpp b/clang/lib/Index/USRGeneration.cpp
index a23e3578d3ab4..1d5dcacdaa41f 100644
--- a/clang/lib/Index/USRGeneration.cpp
+++ b/clang/lib/Index/USRGeneration.cpp
@@ -13,7 +13,6 @@
 #include "clang/AST/DeclTemplate.h"
 #include "clang/AST/DeclVisitor.h"
 #include "clang/AST/ODRHash.h"
-#include "clang/Basic/FileManager.h"
 #include "clang/Lex/PreprocessingRecord.h"
 #include "llvm/Support/Path.h"
 #include "llvm/Support/raw_ostream.h"