Revert to the behavior that if no flag is specified, the LLVM default is
used. Otherwise, the 'validate-runpath phase in Guix fails, as it looks at
RUNPATH, not RPATH.

The lines removed by this patch were introduced in
https://github.com/ROCm/llvm-project/commit/eab679eba1ebe61b2cda99b27ad3f122a9caa14b

diff --git a/clang/lib/Driver/ToolChains/CommonArgs.cpp b/clang/lib/Driver/ToolChains/CommonArgs.cpp
index 4ce53b29e326..379b0507180e 100644
--- a/clang/lib/Driver/ToolChains/CommonArgs.cpp
+++ b/clang/lib/Driver/ToolChains/CommonArgs.cpp
@@ -1313,11 +1313,6 @@ void tools::addOpenMPRuntimeSpecificRPath(const ToolChain &TC,
     // lib-debug/lib-perf
     if (LibSuffix != "lib")
       addRPathCmdArg(Args, CmdArgs, DefaultLibPath.c_str());
-
-    if (llvm::find_if(CmdArgs, [](StringRef str) {
-          return !str.compare("--enable-new-dtags");
-        }) == CmdArgs.end())
-      CmdArgs.push_back("--disable-new-dtags");
   }
 }