Remove redundant return statements

sway/config/bar.c

@@ -256,7 +256,6 @@ static void invoke_swaybar(struct bar_config *bar) {
 	}
 
 	sway_log(SWAY_DEBUG, "Spawned swaybar %s", bar->id);
-	return;
 }
 
 void load_swaybar(struct bar_config *bar) {

sway/config/seat.c

@@ -99,7 +99,6 @@ static void seat_attachment_config_free(
 		struct seat_attachment_config *attachment) {
 	free(attachment->identifier);
 	free(attachment);
-	return;
 }
 
 static struct seat_attachment_config *seat_attachment_config_copy(

sway/ipc-server.c

@@ -909,7 +909,6 @@ void ipc_client_handle_command(struct ipc_client *client, uint32_t payload_lengt
 
 exit_cleanup:
 	free(buf);
-	return;
 }
 
 bool ipc_send_reply(struct ipc_client *client, enum ipc_command_type payload_type,