[profiler] Don't document the nocalls option.

This one is only for compatibility, so don't document it.

Author: Alex Rønne Petersen

mono/profiler/log-args.c

@@ -332,7 +332,6 @@ usage (void)
 	mono_profiler_printf ("\theapshot-on-shutdown do a heapshot on runtime shutdown");
 	mono_profiler_printf ("\t                     this option is independent of the above option");
 	mono_profiler_printf ("\tcalls                enable recording enter/leave method events (very heavy)");
-	mono_profiler_printf ("\tnocalls              compat switch with previous versions of the profiler, does nothing");
 	mono_profiler_printf ("\tcoverage             enable collection of code coverage data");
 	mono_profiler_printf ("\tcovfilter=ASSEMBLY   add ASSEMBLY to the code coverage filters");
 	mono_profiler_printf ("\t                     prefix a + to include the assembly or a - to exclude it");