FlatpakBackend: Remove return value from package transactions

Author: leolost2605

src/Core/FlatpakBackend.vala

@@ -1721,7 +1721,7 @@ public class AppCenterCore.FlatpakBackend : Object {
         job.results_ready ();
     }
 
-    public async bool install_package (Package package, ChangeInformation? change_info, Cancellable? cancellable) throws GLib.Error {
+    public async void install_package (Package package, ChangeInformation? change_info, Cancellable? cancellable) throws GLib.Error {
         var job_args = new InstallPackageArgs ();
         job_args.package = package;
         job_args.change_info = change_info;
@@ -1731,8 +1731,6 @@ public class AppCenterCore.FlatpakBackend : Object {
         if (job.error != null) {
             throw job.error;
         }
-
-        return true;
     }
 
     private void remove_package_internal (Job job) {
@@ -1841,7 +1839,7 @@ public class AppCenterCore.FlatpakBackend : Object {
         job.results_ready ();
     }
 
-    public async bool remove_package (Package package, ChangeInformation? change_info, Cancellable? cancellable) throws GLib.Error {
+    public async void remove_package (Package package, ChangeInformation? change_info, Cancellable? cancellable) throws GLib.Error {
         var job_args = new RemovePackageArgs ();
         job_args.package = package;
         job_args.change_info = change_info;
@@ -1851,8 +1849,6 @@ public class AppCenterCore.FlatpakBackend : Object {
         if (job.error != null) {
             throw job.error;
         }
-
-        return true;
     }
 
     private void update_package_internal (Job job) {
@@ -1996,7 +1992,7 @@ public class AppCenterCore.FlatpakBackend : Object {
         }
     }
 
-    public async bool update_package (Package package, ChangeInformation? change_info, Cancellable? cancellable) throws GLib.Error {
+    public async void update_package (Package package, ChangeInformation? change_info, Cancellable? cancellable) throws GLib.Error {
         var job_args = new UpdatePackageArgs ();
         job_args.package = package;
         job_args.change_info = change_info;
@@ -2006,8 +2002,6 @@ public class AppCenterCore.FlatpakBackend : Object {
         if (job.error != null) {
             throw job.error;
         }
-
-        return true;
     }
 
     private void get_updates_internal (Job job) {