libfabric: Gah -- also remove the "pragma pop" line

Thanks to Nathan for pointing out that I missed snipping one line in
2f9c69f016 (I removed the trailing
comment, but not the trailing pragma -- oops!).

opal/mca/common/libfabric/libfabric/include/rdma/fi_eq.h

@@ -140,7 +140,6 @@ struct fi_eq_cm_entry {
 	struct fi_info		*info;
 	/* connection data placed here, up to space provided */
 	uint8_t			data[];
-#pragma GCC diagnostic pop
 };
 
 struct fi_ops_eq {