fix(update): revert check (#14424)

Signed-off-by: fufesou <linlong1266@gmail.com>

flutter/lib/common.dart

@@ -3938,9 +3938,7 @@ void earlyAssert() {
 
 void checkUpdate() {
   if (!isWeb) {
-    final isWindowsInstalled = isWindows && bind.mainIsInstalled();
-    final shouldCheckUpdate = isWindowsInstalled || !bind.isCustomClient();
-    if (shouldCheckUpdate) {
+    if (!bind.isCustomClient()) {
       platformFFI.registerEventHandler(
           kCheckSoftwareUpdateFinish, kCheckSoftwareUpdateFinish,
           (Map<String, dynamic> evt) async {

flutter/lib/desktop/pages/desktop_home_page.dart

@@ -430,12 +430,10 @@ class _DesktopHomePageState extends State<DesktopHomePage>
   }
 
   Widget buildHelpCards(String updateUrl) {
-    final isWindowsInstalled = isWindows && bind.mainIsInstalled();
-    if (updateUrl.isNotEmpty &&
+    if (!bind.isCustomClient() &&
+        updateUrl.isNotEmpty &&
         !isCardClosed &&
-        (isWindowsInstalled ||
-            (!bind.isCustomClient() &&
-                bind.mainUriPrefixSync().contains('rustdesk')))) {
+        bind.mainUriPrefixSync().contains('rustdesk')) {
       final isToUpdate = (isWindows || isMacOS) && bind.mainIsInstalled();
       String btnText = isToUpdate ? 'Update' : 'Download';
       GestureTapCallback onPressed = () async {

src/common.rs

@@ -940,9 +940,7 @@ pub fn is_modifier(evt: &KeyEvent) -> bool {
 }
 
 pub fn check_software_update() {
-    let is_windows_installed = cfg!(target_os = "windows") && is_installed();
-    let should_check_update = is_windows_installed || !is_custom_client();
-    if !should_check_update {
+    if is_custom_client() {
         return;
     }
     let opt = LocalConfig::get_option(keys::OPTION_ENABLE_CHECK_UPDATE);