CDRIVER-820: error: #pragma GCC diagnostic not allowed inside functions

And remove the unhelpful (debug) assert that cause two tickets so far

Author: bjori

src/mongoc/mongoc-matcher-op.c

@@ -162,15 +162,6 @@ _mongoc_matcher_op_compare_new (mongoc_matcher_opcode_t  opcode, /* IN */
 {
    mongoc_matcher_op_t *op;
 
-#if defined(__GNUC__)
-# pragma GCC diagnostic push
-# pragma GCC diagnostic ignored "-Wtype-limits"
-#endif
-   BSON_ASSERT ((opcode >= MONGOC_MATCHER_OPCODE_EQ) &&
-                (opcode <= MONGOC_MATCHER_OPCODE_NIN));
-#if defined(__GNUC__)
-# pragma GCC diagnostic pop
-#endif
    BSON_ASSERT (path);
    BSON_ASSERT (iter);