Reverted IntelliJ's "cleanup"

core/src/mindustry/graphics/CubemapMesh.java

@@ -3,6 +3,7 @@ package mindustry.graphics;
 import arc.*;
 import arc.graphics.*;
 import arc.graphics.Texture.*;
+import arc.graphics.VertexAttributes.*;
 import arc.graphics.gl.*;
 import arc.math.geom.*;
 import arc.util.*;

core/src/mindustry/graphics/IndexedRenderer.java

@@ -1,6 +1,7 @@
 package mindustry.graphics;
 
 import arc.graphics.*;
+import arc.graphics.VertexAttributes.*;
 import arc.graphics.g2d.*;
 import arc.graphics.gl.*;
 import arc.math.*;

core/src/mindustry/graphics/g3d/MeshBuilder.java

@@ -1,6 +1,7 @@
 package mindustry.graphics.g3d;
 
 import arc.graphics.*;
+import arc.graphics.VertexAttributes.*;
 import arc.graphics.gl.*;
 import arc.math.geom.*;
 import mindustry.graphics.g3d.PlanetGrid.*;