From: Michael R. Crusoe <crusoe@debian.org>
Subject: don't add extra compile flags that conflict with dpkg-buildflags

We'll set the -O optimization level ourselves in debian/rules

Bug: https://github.com/mypyc/mypyc/issues/1158
--- python-librt.orig/setup.py
+++ python-librt/setup.py
@@ -95,7 +95,6 @@
                     "getargsfast.c",
                 ],
                 include_dirs=["."],
-                extra_compile_args=cflags,
             )
         ]
     )
