See gdb ChangeLog entry with header:

Thu Jul 25 19:41:31 1996  Fred Fish  <fnf@cygnus.com>

for a rather huge set of changes.  I was going to put them here, but it
made cvs dump core.  :-(

gdb/remote-e7000.c

@@ -57,8 +57,6 @@
 #define ACK  0x06
 #define CTRLZ 0x1a
 
-extern void notice_quit PARAMS ((void));
-
 extern void report_transfer_performance PARAMS ((unsigned long,
 						 time_t, time_t));