kconfig/conf: merge duplicate switch's case

Signed-off-by: Arnaud Lacombe <lacombar@gmail.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
diff --git a/scripts/kconfig/conf.c b/scripts/kconfig/conf.c
index 5459a38..659326c 100644
--- a/scripts/kconfig/conf.c
+++ b/scripts/kconfig/conf.c
@@ -529,8 +529,6 @@
 		}
 		break;
 	case savedefconfig:
-		conf_read(NULL);
-		break;
 	case silentoldconfig:
 	case oldaskconfig:
 	case oldconfig: