common: remove commented out "less portable" timing code

Precise timing is not important for the job vis does.

Signed-off-by: Kevin Shanahan <kmshanah@disenchant.net>

common/cmdlib.c

@@ -184,23 +184,8 @@ I_FloatTime(void)
     time_t t;
 
     time(&t);
+
     return t;
-
-#if 0
-    /* more precise, less portable */
-    struct timeval tp;
-    struct timezone tzp;
-    static int secbase;
-
-    gettimeofday(&tp, &tzp);
-
-    if (!secbase) {
-	secbase = tp.tv_sec;
-	return tp.tv_usec / 1000000.0;
-    }
-
-    return (tp.tv_sec - secbase) + tp.tv_usec / 1000000.0;
-#endif
 }
 
 void