[clang] [clang-tools-extra] [clang] Make deprecations of some `FileManager` APIs formal (PR #110014)

[Ben Langmuir via cfe-commits]

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@@ -1925,8 +1921,8 @@ ModuleLoadResult CompilerInstance::findOrCompileModuleAndReadAST(
     M = HS.lookupModule(ModuleName, ImportLoc, true, !IsInclusionDirective);
 
     // Check whether M refers to the file in the prebuilt module path.
-    if (M && M->getASTFile())
-      if (auto ModuleFile = FileMgr->getFile(ModuleFilename))
+    if (M && M->getASTFile() && M->getASTFile())
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benlangmuir wrote:

Redundant condition

https://github.com/llvm/llvm-project/pull/110014