Remove redundant return statements from interactive gatttool
diff --git a/attrib/interactive.c b/attrib/interactive.c
index 99e99c5..b32e9e7 100644
--- a/attrib/interactive.c
+++ b/attrib/interactive.c
@@ -353,8 +353,6 @@
 						opt_mtu, connect_cb);
 	if (iochannel == NULL)
 		set_state(STATE_DISCONNECTED);
-
-	return;
 }
 
 static void cmd_disconnect(int argcp, char **argvp)
@@ -370,8 +368,6 @@
 	iochannel = NULL;
 
 	set_state(STATE_DISCONNECTED);
-
-	return;
 }
 
 static void cmd_primary(int argcp, char **argvp)