remove unused method

platform/lang-impl/src/com/intellij/injected/editor/EditorWindow.java

@@ -393,10 +393,6 @@ public class EditorWindow implements EditorEx, UserDataHolderEx {
     myDelegate.setBackgroundColor(color);
   }
 
-  public void resetBackgourndColor() {
-    myDelegate.resetBackgourndColor();
-  }
-
   public Color getBackroundColor() {
     return myDelegate.getBackroundColor();
   }

platform/platform-impl/src/com/intellij/openapi/editor/ex/EditorEx.java

@@ -111,8 +111,6 @@ public interface EditorEx extends Editor {
 
   void setBackgroundColor(Color color);
 
-  void resetBackgourndColor();
-
   Dimension getContentSize();
 
   boolean isEmbeddedIntoDialogWrapper();

platform/platform-impl/src/com/intellij/openapi/editor/impl/EditorImpl.java

@@ -1271,10 +1271,6 @@ public final class EditorImpl extends UserDataHolderBase implements EditorEx, Hi
     myForcedBackground = color;
   }
 
-  public void resetBackgourndColor() {
-    myForcedBackground = null;
-  }
-
   public Color getForegroundColor() {
     return myScheme.getDefaultForeground();
   }