[llvm-stress] Remove unneeded llvm:: prefix. NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@242020 91177308-0d34-0410-b5e6-96231b3b80d8

tools/llvm-stress/llvm-stress.cpp

@@ -682,7 +682,7 @@ int main(int argc, char **argv) {
   using namespace llvm;
 
   // Init LLVM, call llvm_shutdown() on exit, parse args, etc.
-  llvm::PrettyStackTraceProgram X(argc, argv);
+  PrettyStackTraceProgram X(argc, argv);
   cl::ParseCommandLineOptions(argc, argv, "llvm codegen stress-tester\n");
   llvm_shutdown_obj Y;