remove unused resource

Signed-off-by: Andy Scherzinger <info@andy-scherzinger.de>

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

@@ -82,7 +82,6 @@
 
     <color name="bg_bottom_sheet">#FFFFFF</color>
     <color name="bg_call_screen_dialog">#121212</color>
-    <color name="call_screen_text">#ffffffff</color>
 
     <color name="call_buttons_background">#BF999999</color>
     <color name="favorite_icon_tint">#FFCC00</color>