Rename some functions, delete unused one. No code changes

* defs.h: Rename get_scno_on_sysenter() to get_scno();
delete force_result() declaration.
* strace.c (proc_open): Rename get_scno_on_sysenter() to get_scno().
* syscall.c: Rename get_scno_on_sysenter() to get_scno().
Rename get_scno_on_sysexit() to get_syscall_result().
Delete unused force_result().

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
diff --git a/defs.h b/defs.h
index bda72cb..89375ae 100644
--- a/defs.h
+++ b/defs.h
@@ -587,12 +587,11 @@
 extern void set_overhead(int);
 extern void qualify(const char *);
 #ifdef USE_PROCFS
-extern int get_scno_on_sysenter(struct tcb *);
+extern int get_scno(struct tcb *);
 #endif
 extern long known_scno(struct tcb *);
 extern long do_ptrace(int request, struct tcb *tcp, void *addr, void *data);
 extern int ptrace_restart(int request, struct tcb *tcp, int sig);
-extern int force_result(struct tcb *, int, long);
 extern int trace_syscall(struct tcb *);
 extern void count_syscall(struct tcb *, struct timeval *);
 extern void printxval(const struct xlat *, int, const char *);