[공통][Common] 불필요 파일 제거

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

@@ -1,7 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<android.support.constraint.ConstraintLayout
-  xmlns:android="http://schemas.android.com/apk/res/android"
-  android:layout_width="match_parent"
-  android:layout_height="match_parent">
-
-</android.support.constraint.ConstraintLayout>