[Driver] Delete --no-add-needed for RHEL7 or newer

This is really not needed. gcc driver doesn't add this option.
BTW, since binutils 2.22, --no-copy-dt-needed-entries (new name of
--no-add-needed) is the default.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@365877 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Driver/ToolChains/Linux.cpp

@@ -300,9 +300,6 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
       ExtraOpts.push_back("--hash-style=both");
   }
 
-  if (Distro.IsRedhat() && Distro != Distro::RHEL5 && Distro != Distro::RHEL6)
-    ExtraOpts.push_back("--no-add-needed");
-
 #ifdef ENABLE_LINKER_BUILD_ID
   ExtraOpts.push_back("--build-id");
 #endif