[clang] Remove unused variable in test

Author: jansvoboda11

clang/unittests/Tooling/DependencyScanning/DependencyScanningFilesystemTest.cpp

@@ -102,11 +102,8 @@ TEST(DependencyScanningFilesystem, RealPathAndStatusInvariants) {
   InMemoryFS->addFile("/foo.c", 0, llvm::MemoryBuffer::getMemBuffer(""));
   InMemoryFS->addFile("/bar.c", 0, llvm::MemoryBuffer::getMemBuffer(""));
 
-  auto InstrumentingFS =
-      llvm::makeIntrusiveRefCnt<InstrumentingFilesystem>(InMemoryFS);
-
   DependencyScanningFilesystemSharedCache SharedCache;
-  DependencyScanningWorkerFilesystem DepFS(SharedCache, InstrumentingFS);
+  DependencyScanningWorkerFilesystem DepFS(SharedCache, InMemoryFS);
 
   // Success.
   {