remove dead code

GitOrigin-RevId: 1851e8980eed421bbaafc3fe214e2b82797e86fe

platform/platform-impl/src/com/intellij/openapi/fileEditor/impl/FileEditorManagerImpl.java

@@ -70,7 +70,6 @@ import com.intellij.util.concurrency.AppExecutorUtil;
 import com.intellij.util.containers.ContainerUtil;
 import com.intellij.util.messages.MessageBusConnection;
 import com.intellij.util.messages.impl.MessageListenerList;
-import com.intellij.util.ui.JBUI;
 import com.intellij.util.ui.UIUtil;
 import com.intellij.util.ui.update.MergingUpdateQueue;
 import com.intellij.util.ui.update.Update;
@@ -82,7 +81,6 @@ import org.jetbrains.concurrency.AsyncPromise;
 import org.jetbrains.concurrency.Promise;
 
 import javax.swing.*;
-import javax.swing.border.Border;
 import java.awt.*;
 import java.awt.event.InputEvent;
 import java.awt.event.KeyEvent;
@@ -323,9 +321,6 @@ public class FileEditorManagerImpl extends FileEditorManagerEx implements Persis
     synchronized (myInitLock) {
       result = mySplitters;
       if (result == null) {
-        JPanel panel = new JPanel(new BorderLayout());
-        panel.setOpaque(false);
-        panel.setBorder(new MyBorder());
         result = new EditorsSplitters(this, true);
         mySplitters = result;
         Disposer.register(this, mySplitters);
@@ -334,23 +329,6 @@ public class FileEditorManagerImpl extends FileEditorManagerEx implements Persis
     return result;
   }
 
-  private static class MyBorder implements Border {
-    @Override
-    public void paintBorder(@NotNull Component c, @NotNull Graphics g, int x, int y, int width, int height) {
-    }
-
-    @NotNull
-    @Override
-    public Insets getBorderInsets(Component c) {
-      return JBUI.emptyInsets();
-    }
-
-    @Override
-    public boolean isBorderOpaque() {
-      return false;
-    }
-  }
-
   @Override
   public JComponent getPreferredFocusedComponent() {
     assertReadAccess();