Frontend: Remove redundant call to CompilerInstance::setFileManager, NFC

`ASTUnit::Parse` sets up the `FileManager` earlier in the same function,
ensuring `ASTUnit::getFileManager()` matches `Clang->getFileManager()`.
Remove the later call to `setFileManager(getFileManager())` since it
does nothing.

Differential Revision: https://reviews.llvm.org/D90888

diff --git a/clang/lib/Frontend/ASTUnit.cpp b/clang/lib/Frontend/ASTUnit.cpp
index c2aba41..c8ac7ea 100644 (file)
--- a/clang/lib/Frontend/ASTUnit.cpp
+++ b/clang/lib/Frontend/ASTUnit.cpp
@@ -1186,9 +1186,6 @@ bool ASTUnit::Parse(std::shared_ptr<PCHContainerOperations> PCHContainerOps,
     TopLevelDeclsInPreamble.clear();
   }
 
-  // Create a file manager object to provide access to and cache the filesystem.
-  Clang->setFileManager(&getFileManager());
-
   // Create the source manager.
   Clang->setSourceManager(&getSourceManager());