overlay: Remove unused dimen auth_ripple_alpha_in_duration

Bug: 274785453
Test: device builds
Change-Id: I16995427297c5d11ee5448fb8be53682ab36e5d7

lynx/overlay/frameworks/base/packages/SystemUI/res/values/dimens.xml

@@ -46,10 +46,6 @@
     <dimen name="physical_volume_up_button_center_screen_location_y">1064px</dimen>
     <dimen name="physical_volume_down_button_center_screen_location_y">1232px</dimen>
 
-    <!-- Alpha in duration in ms for the auth ripple to become fully vislble.
-         If set to 0, it is immediately visible, which is desired for devices supporting UDFPS. -->
-    <integer name="auth_ripple_alpha_in_duration">0</integer>
-
     <!-- Movement should not be more than 1mm -->
     <dimen name="udfps_burn_in_offset_y">16px</dimen>