feat: 优化代码

app/src/main/res/xml/pref_main.xml

@@ -30,13 +30,13 @@
         android:icon="@drawable/ic_cfg_theme"
         app:iconSpaceReserved="false" />
 
-    <io.legado.app.ui.widget.prefs.SwitchPreference
+    <!--    <io.legado.app.ui.widget.prefs.SwitchPreference
-        android:defaultValue="false"
+            android:defaultValue="false"
-        android:key="isEInkMode"
+            android:key="isEInkMode"
-        android:title="@string/eink_theme"
+            android:title="@string/eink_theme"
-        android:summary="@string/eink_theme_desc"
+            android:summary="@string/eink_theme_desc"
-        android:icon="@drawable/ic_cfg_e_lnk"
+            android:icon="@drawable/ic_cfg_e_lnk"
-        app:iconSpaceReserved="false" />
+            app:iconSpaceReserved="false" />-->
 
     <io.legado.app.ui.widget.prefs.SwitchPreference
         android:defaultValue="false"