Remove unused attrs

app/src/main/res/values/attrs.xml

@@ -7,9 +7,7 @@
 
   <!-- theme attributes -->
   <attr format="reference" name="overlay_theme"/>
-  <attr format="dimension" name="card_elevation"/>
   <attr format="integer" name="horizontal_divider_visibility"/>
-  <attr format="color" name="colorOnPrimaryHint"/>
 
   <declare-styleable name="TimePreference">
     <attr format="string" name="time_summary"/>

app/src/main/res/values/styles.xml

@@ -45,7 +45,6 @@
     <item name="overlay_theme">@style/WhiteToolbarOverlay</item>
     <item name="iconTint">@color/white_100</item>
     <item name="colorOnPrimary">@color/white_100</item>
-    <item name="colorOnPrimaryHint">@color/white_60</item>
     <item name="android:actionOverflowButtonStyle">@style/WhiteOverflow</item>
     <item name="toolbarNavigationButtonStyle">@style/WhiteNavigation</item>
   </style>
@@ -54,7 +53,6 @@
     <item name="overlay_theme">@style/BlackToolbarOverlay</item>
     <item name="iconTint">@color/black_87</item>
     <item name="colorOnPrimary">@color/black_87</item>
-    <item name="colorOnPrimaryHint">@color/black_60</item>
     <item name="android:actionOverflowButtonStyle">@style/BlackOverflow</item>
     <item name="toolbarNavigationButtonStyle">@style/BlackNavigation</item>
   </style>

app/src/main/res/values/theme.xml

@@ -23,7 +23,6 @@
     <item name="android:textColorPrimary">@color/text_primary</item>
     <item name="android:textColorSecondary">@color/text_secondary</item>
     <item name="android:textColorTertiary">@color/text_tertiary</item>
-    <item name="card_elevation">2dp</item>
     <item name="horizontal_divider_visibility">2</item> <!-- View.GONE -->
     <item name="materialTimePickerTheme">@style/ClockTheme</item>
     <item name="materialCalendarTheme">@style/CalendarTheme</item>
@@ -56,7 +55,6 @@
     <item name="android:windowBackground">@color/black_38</item>
     <item name="android:colorBackground">@color/black_60</item>
     <item name="android:windowShowWallpaper">true</item>
-    <item name="card_elevation">0dp</item>
   </style>
 
 </resources>