Remove multi-packet additions to response parsing

The additions to the packet parsing code weren't necessary once the
statement output change was reverted.

include/maxscale/modutil.h

@@ -62,12 +62,10 @@ GWBUF*          modutil_create_mysql_err_msg(int             packet_number,
  * @param reply      Buffer to use
  * @param n_found    Number of previous found packets
  * @param more       Set to true of more results exist
- * @param offset_out Initial offset into the buffer. This offset is set to point
- *                   to the first byte after the last packet in the buffer.
  *
  * @return Total number of EOF and ERR packets including the ones already found
  */
-int modutil_count_signal_packets(GWBUF *reply, int n_found, bool* more, size_t* offset_out);
+int modutil_count_signal_packets(GWBUF *reply, int n_found, bool* more);
 
 mxs_pcre2_result_t modutil_mysql_wildcard_match(const char* pattern, const char* string);
 

include/maxscale/protocol/mysql.h

@@ -432,21 +432,19 @@ bool mxs_mysql_is_ok_packet(GWBUF *buffer);
  * @brief Check if a buffer contains a result set
  *
  * @param buffer Buffer to check
- * @param offset Offset into the buffer
  *
- * @return True if the @c buffer at @c offset contains the start of a result set
+ * @return True if the @c buffer contains the start of a result set
  */
-bool mxs_mysql_is_result_set(GWBUF *buffer, size_t offset);
+bool mxs_mysql_is_result_set(GWBUF *buffer);
 
 /**
  * @brief Check if the OK packet is followed by another result
  *
  * @param buffer Buffer to check
- * @param offset Offset into the buffer
  *
  * @return True if more results are expected
  */
-bool mxs_mysql_more_results_after_ok(GWBUF *buffer, size_t extra_offset);
+bool mxs_mysql_more_results_after_ok(GWBUF *buffer);
 
 /** Get current command for a session */
 mysql_server_cmd_t mxs_mysql_current_command(MXS_SESSION* session);