[clang] [clang-tools-extra] [clang] NFC: Remove `OptionalFileEntryRefDegradesToFileEntryPtr` (PR #74899)

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``````````bash
git-clang-format --diff 8615ead9a6d37e6353df1b652aadebe71ec6c242 de1d9c6808271ea802813daa71e6d94bce8a9894 -- clang-tools-extra/clang-tidy/ExpandModularHeadersPPCallbacks.cpp clang/include/clang/Basic/FileEntry.h clang/include/clang/Basic/Module.h clang/include/clang/Basic/SourceManager.h clang/include/clang/Lex/PreprocessorLexer.h clang/include/clang/Serialization/ModuleFile.h clang/lib/Frontend/CompilerInstance.cpp clang/lib/Lex/ModuleMap.cpp clang/lib/Lex/PPDirectives.cpp clang/lib/Lex/Pragma.cpp clang/lib/Lex/PreprocessorLexer.cpp clang/lib/Serialization/ASTReader.cpp clang/lib/Serialization/ASTWriter.cpp clang/lib/Serialization/ModuleManager.cpp clang/lib/Tooling/DependencyScanning/ModuleDepCollector.cpp clang/tools/libclang/CXIndexDataConsumer.cpp clang/tools/libclang/CXIndexDataConsumer.h clang/unittests/Basic/FileEntryTest.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/clang/tools/libclang/CXIndexDataConsumer.cpp b/clang/tools/libclang/CXIndexDataConsumer.cpp
index a327d39ee0..c1022263a5 100644
--- a/clang/tools/libclang/CXIndexDataConsumer.cpp
+++ b/clang/tools/libclang/CXIndexDataConsumer.cpp
@@ -1104,7 +1104,7 @@ void CXIndexDataConsumer::translateLoc(SourceLocation Loc,
 
   if (FID.isInvalid())
     return;
-  
+
   OptionalFileEntryRef FE = SM.getFileEntryRefForID(FID);
   if (indexFile)
     *indexFile = getIndexFile(FE);
diff --git a/clang/tools/libclang/CXIndexDataConsumer.h b/clang/tools/libclang/CXIndexDataConsumer.h
index eb9b2eaae2..54a3add3a9 100644
--- a/clang/tools/libclang/CXIndexDataConsumer.h
+++ b/clang/tools/libclang/CXIndexDataConsumer.h
@@ -461,7 +461,7 @@ private:
   const DeclContext *getEntityContainer(const Decl *D) const;
 
   CXIdxClientFile getIndexFile(OptionalFileEntryRef File);
-  
+
   CXIdxLoc getIndexLoc(SourceLocation Loc) const;
 
   void getEntityInfo(const NamedDecl *D,

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https://github.com/llvm/llvm-project/pull/74899