backend/session: Remove noop backend

This is instead delegated to libseat.

backend/session/meson.build

@@ -5,7 +5,6 @@ libseat = dependency('libseat',
 )
 
 wlr_files += files(
-	'noop.c',
 	'session.c',
 	'libseat.c'
 )

backend/session/noop.c

@@ -1,51 +0,0 @@
-#define _POSIX_C_SOURCE 200809L
-#include <fcntl.h>
-#include <stdbool.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <wayland-server-core.h>
-#include <wlr/backend/session/interface.h>
-#include <wlr/util/log.h>
-#include "backend/session/session.h"
-#include "util/signal.h"
-
-const struct session_impl session_noop;
-
-static int noop_session_open(struct wlr_session *base, const char *path) {
-	return open(path, O_RDWR | O_CLOEXEC);
-}
-
-static void noop_session_close(struct wlr_session *base, int fd) {
-	close(fd);
-}
-
-static bool noop_change_vt(struct wlr_session *base, unsigned vt) {
-	return false;
-}
-
-static void noop_session_destroy(struct wlr_session *base) {
-	free(base);
-}
-
-static struct wlr_session *noop_session_create(struct wl_display *disp) {
-	struct wlr_session *session = calloc(1, sizeof(*session));
-	if (!session) {
-		wlr_log_errno(WLR_ERROR, "Allocation failed");
-		return NULL;
-	}
-
-	session_init(session);
-	session->impl = &session_noop;
-	session->active = true;
-
-	wlr_log(WLR_INFO, "Successfully initialized noop session");
-	return session;
-}
-
-const struct session_impl session_noop = {
-	.create = noop_session_create,
-	.destroy = noop_session_destroy,
-	.open = noop_session_open,
-	.close = noop_session_close,
-	.change_vt = noop_change_vt,
-};

backend/session/session.c

@@ -21,7 +21,6 @@
 #define WAIT_GPU_TIMEOUT 10000 // ms
 
 extern const struct session_impl session_libseat;
-extern const struct session_impl session_noop;
 
 static const struct session_impl *const impls[] = {
 	&session_libseat,
@@ -109,8 +108,6 @@ struct wlr_session *wlr_session_create(struct wl_display *disp) {
 	if (env_wlr_session) {
 		if (strcmp(env_wlr_session, "libseat") == 0) {
 			session = session_libseat.create(disp);
-		} else if (strcmp(env_wlr_session, "noop") == 0) {
-			session = session_noop.create(disp);
 		} else {
 			wlr_log(WLR_ERROR, "Unsupported WLR_SESSION: %s",
 				env_wlr_session);