perf tools: Remove unnecessary calc_data_size variable

It's not set from anywhere so no need to keep it.  Looks like an
unneeded copy of the same variable in trace-event-read.c
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1363173585-9754-4-git-send-email-namhyung@kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/trace-event-info.c

@@ -119,17 +119,10 @@ static void put_tracing_file(char *file)
 	free(file);
 }
 
-static ssize_t calc_data_size;
-
 static ssize_t write_or_die(const void *buf, size_t len)
 {
 	int ret;
 
-	if (calc_data_size) {
-		calc_data_size += len;
-		return len;
-	}
-
 	ret = write(output_fd, buf, len);
 	if (ret < 0)
 		die("writing to '%s'", output_file);