Remove all @2x resources. They are the new standard.

osu.Game.Resources/osu.Game.Resources.csproj

@@ -38,31 +38,22 @@
     <Compile Include="Properties\AssemblyInfo.cs" />
   </ItemGroup>
   <ItemGroup>
-    <EmbeddedResource Include="Textures\Menu\logo%402x.png" />
+    <EmbeddedResource Include="Textures\Menu\logo.png" />
     <EmbeddedResource Include="Textures\KeyCounter\key-glow.png" />
-    <EmbeddedResource Include="Textures\KeyCounter\key-glow%402x.png" />
     <EmbeddedResource Include="Textures\KeyCounter\key-hit.png" />
-    <EmbeddedResource Include="Textures\KeyCounter\key-hit%402x.png" />
     <EmbeddedResource Include="Textures\KeyCounter\key-up.png" />
-    <EmbeddedResource Include="Textures\KeyCounter\key-up%402x.png" />
     <EmbeddedResource Include="Beatmaps\241526 Soleily - Renatus.osz" />
     <EmbeddedResource Include="Samples\Sliderbar\sliderbar.mp3" />
   </ItemGroup>
   <ItemGroup>
     <EmbeddedResource Include="Textures\Gameplay\Catch\fruit-catcher-fail.png" />
-    <EmbeddedResource Include="Textures\Gameplay\Catch\fruit-catcher-fail%402x.png" />
     <EmbeddedResource Include="Textures\Gameplay\Catch\fruit-catcher-idle.png" />
-    <EmbeddedResource Include="Textures\Gameplay\Catch\fruit-catcher-idle%402x.png" />
     <EmbeddedResource Include="Textures\Gameplay\Catch\fruit-catcher-kiai.png" />
-    <EmbeddedResource Include="Textures\Gameplay\Catch\fruit-catcher-kiai%402x.png" />
   </ItemGroup>
   <ItemGroup>
     <EmbeddedResource Include="Shaders\sh_CircularProgressBar.fs" />
     <EmbeddedResource Include="Shaders\sh_CursorTrail.vs" />
   </ItemGroup>
-  <ItemGroup>
-    <EmbeddedResource Include="Textures\Menu\logo.png" />
-  </ItemGroup>
   <ItemGroup>
     <EmbeddedResource Include="Samples\welcome.mp3" />
   </ItemGroup>
@@ -98,7 +89,6 @@
     <EmbeddedResource Include="Fonts\osuFont_0.png" />
   </ItemGroup>
   <ItemGroup>
-    <EmbeddedResource Include="Textures\Menu\background%402x.jpg" />
     <EmbeddedResource Include="Textures\Menu\background.jpg" />
   </ItemGroup>
   <ItemGroup>
@@ -115,13 +105,12 @@
     <EmbeddedResource Include="Textures\Backgrounds\bg4.jpg" />
   </ItemGroup>
   <ItemGroup>
-    <EmbeddedResource Include="Textures\Play\osu\approachcircle%402x.png" />
+    <EmbeddedResource Include="Textures\Play\osu\approachcircle.png" />
-    <EmbeddedResource Include="Textures\Play\osu\disc%402x.png" />
+    <EmbeddedResource Include="Textures\Play\osu\disc.png" />
-    <EmbeddedResource Include="Textures\Play\osu\number%402x.png" />
+    <EmbeddedResource Include="Textures\Play\osu\number.png" />
-    <EmbeddedResource Include="Textures\Play\osu\ring%402x.png" />
   </ItemGroup>
   <ItemGroup>
-    <EmbeddedResource Include="Textures\Play\osu\ring-glow%402x.png" />
+    <EmbeddedResource Include="Textures\Play\osu\ring-glow.png" />
   </ItemGroup>
   <ItemGroup>
     <EmbeddedResource Include="Fonts\Exo2.0-Black.fnt" />
@@ -168,11 +157,10 @@
     <EmbeddedResource Include="Fonts\FontAwesome_5.png" />
   </ItemGroup>
   <ItemGroup>
-    <EmbeddedResource Include="Textures\Cursor\cursortrail%402x.png" />
     <EmbeddedResource Include="Textures\Cursor\cursortrail.png" />
   </ItemGroup>
   <ItemGroup>
-    <EmbeddedResource Include="Textures\Online\avatar-guest%402x.png" />
+    <EmbeddedResource Include="Textures\Online\avatar-guest.png" />
   </ItemGroup>
   <ItemGroup>
     <EmbeddedResource Include="Samples\seeya.mp3" />