Remove --vectors (current kernel only supports 1 vector).

The functionality to set the number of vectors still remains, though.

doc/SCRYPT

@@ -137,10 +137,6 @@ Has a minor effect, should be a multiple of 64 up to 256 maximum.
 SUMMARY: Worth playing with once everything else has been tried but will
 probably do nothing.
 
---vectors XX (-v XX)
-Vectors are NOT used by the scrypt mining kernel.
-SUMMARY: Does nothing.
-
 
 Overclocking for scrypt mining:
 First of all, do not underclock your memory initially. Scrypt mining requires

sgminer.c

@@ -1210,9 +1210,6 @@ static struct opt_table opt_config_table[] = {
 	OPT_WITH_ARG("--user|-u",
 		     set_user, NULL, NULL,
 		     "Username for bitcoin JSON-RPC server"),
-	OPT_WITH_ARG("--vectors|-v",
-		     set_vector, NULL, NULL,
-		     "Override detected optimal vector (1, 2 or 4) - one value or comma separated list"),
 	OPT_WITHOUT_ARG("--verbose",
 			opt_set_bool, &opt_log_output,
 			"Log verbose output to stderr as well as status output"),