Remove night mode from developer settings

It's in SysUI Tuner now.

Change-Id: Id8fbce5462fc0a317c56f70ab2dbb2ffc004ffeb
diff --git a/packages/SettingsLib/res/values/strings.xml b/packages/SettingsLib/res/values/strings.xml
index 57c5684..3c03a4ad 100644
--- a/packages/SettingsLib/res/values/strings.xml
+++ b/packages/SettingsLib/res/values/strings.xml
@@ -673,17 +673,6 @@
     <!-- Services settings screen, setting option summary for the user to go to the screen to view running services  -->
     <string name="runningservices_settings_summary">View and control currently running services</string>
 
-    <!-- Sound & display settings screen, setting option name to change the user interface theme [CHAR LIMIT=30] -->
-    <string name="night_mode_title">Night mode</string>
-    <!-- Sound & display settings screen, setting option summary to change the user interface theme [CHAR LIMIT=100] -->
-    <string name="night_mode_summary">%s</string>
-    <!-- Sound & display settings screen, theme setting value to prefer a light-colored user interface [CHAR LIMIT=30] -->
-    <string name="night_mode_no">Disabled</string>
-    <!-- Sound & display settings screen, theme setting value to prefer a dark-colored user interface [CHAR LIMIT=30] -->
-    <string name="night_mode_yes">Always on</string>
-    <!-- Sound & display settings screen, theme setting value to automatically switch between a light- or dark-colored user interface [CHAR LIMIT=30] -->
-    <string name="night_mode_auto">Automatic</string>
-
     <!-- Developer settings: enable WebView multiprocess name [CHAR LIMIT=30] -->
     <string name="enable_webview_multiprocess">Enable multiprocess WebView</string>
     <!-- Developer settings: enable WebView multiprocess summary [CHAR LIMIT=60] -->