Fix test failures

osu.Game.Tests/Mods/ModUtilsTest.cs

@@ -147,11 +147,11 @@ public void TestNotAllowedThroughBaseType()
                 new Mod[] { new OsuModDeflate(), new OsuModApproachDifferent() },
                 new[] { typeof(OsuModDeflate), typeof(OsuModApproachDifferent) }
             },
-            // system mod.
+            // system mod not applicable in lazer.
             new object[]
             {
-                new Mod[] { new OsuModHidden(), new OsuModTouchDevice() },
-                new[] { typeof(OsuModTouchDevice) }
+                new Mod[] { new OsuModHidden(), new ModScoreV2() },
+                new[] { typeof(ModScoreV2) }
             },
             // multi mod.
             new object[]

osu.Game.Tests/Visual/Multiplayer/TestSceneFreeModSelectOverlay.cs

@@ -133,6 +133,7 @@ private void createFreeModSelect()
         private bool assertAllAvailableModsSelected()
         {
             var allAvailableMods = availableMods.Value
+                                                .Where(pair => pair.Key != ModType.System)
                                                 .SelectMany(pair => pair.Value)
                                                 .Where(mod => mod.UserPlayable && mod.HasImplementation)
                                                 .ToList();

osu.Game/Overlays/Mods/SelectAllModsButton.cs

@@ -41,6 +41,7 @@ protected override void LoadComplete()
         private void updateEnabledState()
         {
             Enabled.Value = availableMods.Value
+                                         .Where(pair => pair.Key != ModType.System)
                                          .SelectMany(pair => pair.Value)
                                          .Any(modState => !modState.Active.Value && modState.Visible);
         }