Remove useless import

Author: seven332

app/src/main/res/layout/gallery_detail_header.xml

@@ -45,7 +45,6 @@
     </LinearLayout>
 
     <LinearLayout
-        xmlns:android="http://schemas.android.com/apk/res/android"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:orientation="vertical">