Fix an issue with new support lib

build.gradle

@@ -28,7 +28,7 @@ configurations.all {
 }
 
 ext {
-    supportLibraryVersion = '25.1.0'
+    supportLibraryVersion = '24.2.1'
 
     travisBuild = System.getenv("TRAVIS") == "true"
 

src/com/owncloud/android/ui/activity/UserInfoActivity.java

@@ -30,7 +30,6 @@ import android.content.Intent;
 import android.os.Bundle;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
-import android.support.v7.widget.DividerItemDecoration;
 import android.support.v7.widget.LinearLayoutManager;
 import android.support.v7.widget.RecyclerView;
 import android.text.TextUtils;