Remove unused imports

Author: helin24

flutter-idea/src/io/flutter/view/EmbeddedBrowser.java

@@ -22,13 +22,11 @@
 import io.flutter.analytics.Analytics;
 import io.flutter.devtools.DevToolsUrl;
 import io.flutter.utils.AsyncUtils;
-import org.jetbrains.annotations.NotNull;
 import io.flutter.utils.LabelInput;
+import org.jetbrains.annotations.NotNull;
 
 import javax.swing.*;
 import java.awt.*;
-import java.awt.event.MouseAdapter;
-import java.awt.event.MouseEvent;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;