diff --git a/clang/lib/Frontend/ASTUnit.cpp b/clang/lib/Frontend/ASTUnit.cpp
--- a/clang/lib/Frontend/ASTUnit.cpp
+++ b/clang/lib/Frontend/ASTUnit.cpp
@@ -866,18 +866,6 @@
   return AST;
 }
 
-std::unique_ptr<ASTUnit> ASTUnit::LoadFromASTFile(
-    const std::string &Filename, const PCHContainerReader &PCHContainerRdr,
-    WhatToLoad ToLoad, IntrusiveRefCntPtr<DiagnosticsEngine> Diags,
-    const FileSystemOptions &FileSystemOpts, bool UseDebugInfo,
-    bool OnlyLocalDecls, CaptureDiagsKind CaptureDiagnostics,
-    bool AllowASTWithCompilerErrors, bool UserFilesAreVolatile) {
-  return LoadFromASTFile(Filename, PCHContainerRdr, ToLoad, Diags,
-                         llvm::vfs::getRealFileSystem(), FileSystemOpts,
-                         UseDebugInfo, OnlyLocalDecls, CaptureDiagnostics,
-                         AllowASTWithCompilerErrors, UserFilesAreVolatile);
-}
-
 /// Add the given macro to the hash of all top-level entities.
 static void AddDefinedMacroToHash(const Token &MacroNameTok, unsigned &Hash) {
   Hash = llvm::djbHash(MacroNameTok.getIdentifierInfo()->getName(), Hash);