offcputime: remove unused global var `exiting`
@@ -38,8 +38,6 @@ static struct env {
.duration = 99999999,
};
-static volatile bool exiting;
-
const char *argp_program_version = "offcputime 0.1";
const char *argp_program_bug_address =
"https://github.com/iovisor/bcc/tree/master/libbpf-tools";
