vty: 'gprs 11bit_rach_support_for_egprs': drop redundant check

The VTY command parser would not allow values other than 0 or 1.

Change-Id: Ic29fac12414f1821702759a9f5260e941c9868b5
diff --git a/src/osmo-bsc/bsc_vty.c b/src/osmo-bsc/bsc_vty.c
index a41db9f..cd3f8a9 100644
--- a/src/osmo-bsc/bsc_vty.c
+++ b/src/osmo-bsc/bsc_vty.c
@@ -3137,13 +3137,7 @@
 
 	bts->gprs.supports_egprs_11bit_rach = atoi(argv[0]);
 
-	if (bts->gprs.supports_egprs_11bit_rach > 1) {
-		vty_out(vty, "Error in RACH type%s", VTY_NEWLINE);
-		return CMD_WARNING;
-	}
-
-	if ((bts->gprs.mode == BTS_GPRS_NONE) &&
-		(bts->gprs.supports_egprs_11bit_rach == 1)) {
+	if (bts->gprs.mode == BTS_GPRS_NONE && bts->gprs.supports_egprs_11bit_rach) {
 		vty_out(vty, "Error:gprs mode is none and 11bit rach is"
 			" enabled%s", VTY_NEWLINE);
 		return CMD_WARNING;