perf tools: Remove duplicate typedef config_term_func_t definition

Older compilers don't like this, for instance, on RHEL6.7:

    CC       /tmp/build/perf/util/parse-events.o
  util/parse-events.c:844: error: redefinition of typedef ‘config_term_func_t’
  util/parse-events.c:353: note: previous declaration of ‘config_term_func_t’ was here

So remove the second definition, that should've been just moved in 43d0b978
("perf tools: Enable config and setting names for legacy cache events"), not copied.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Fixes: 43d0b978 ("perf tools: Enable config and setting names for legacy cache events")
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/parse-events.c

@@ -841,10 +841,6 @@ void parse_events__shrink_config_terms(void)
 	config_term_shrinked = true;
 }
 
-typedef int config_term_func_t(struct perf_event_attr *attr,
-			       struct parse_events_term *term,
-			       struct parse_events_error *err);
-
 static int config_term_common(struct perf_event_attr *attr,
 			      struct parse_events_term *term,
 			      struct parse_events_error *err)