Remove the Images category from Site Settings.

chrome/android/java/strings/android_chrome_strings.grd

 <?xml version="1.0" encoding="UTF-8"?>
 
 <!-- android_chrome_strings.grd contains strings for Chrome for Android.
 
 FAQ:
   - How do I add, change, or remove a string?
       Just update this file.
   - Translations will happen automatically??
       Yes, indeed. Just add your string before the branch point and
       make the description good.
@@ skipping 454 matching lines @@
       </message>
       <message name="IDS_COOKIES_TITLE" desc="Title for the Cookies settings screen [CHAR-LIMIT=32]">
         Cookies
       </message>
       <message name="IDS_ALLOW_THIRD_PARTY_COOKIES_TITLE" desc="Title for Allow Third Party Cookies preference">
         Allow third-party cookies
       </message>
       <message name="IDS_ALLOW_THIRD_PARTY_COOKIES_SUMMARY" desc="Summary text for Allow Third Party Cookies preference">
         Third-party websites can save and read cookie data
       </message>
-      <message name="IDS_IMAGES_PERMISSION_TITLE" desc="Title of the permission to show images [CHAR-LIMIT=32]">
-        Images
-      </message>
       <message name="IDS_JAVASCRIPT_PERMISSION_TITLE" desc="Title of the permission to run javascript [CHAR-LIMIT=32]">
         JavaScript
       </message>
       <message name="IDS_POPUP_PERMISSION_TITLE" desc="Title of the permission to display pop-up windows [CHAR-LIMIT=32]">
         Pop-ups
       </message>
       <message name="IDS_PUSH_NOTIFICATIONS_PERMISSION_TITLE" desc="Title for the permission for showing push notifications [CHAR-LIMIT=32]">
         Notifications
       </message>
       <message name="IDS_MIDI_SYSEX_PERMISSION_TITLE" desc="Title of the permission that allows a website to get full control of MIDI devices [CHAR-LIMIT=32]">
         Allow full control of MIDI devices
       </message>
       <message name="IDS_WEBSITE_SETTINGS_ADD_SITE" desc="The label for the button to add a new website to the exception list.">
         Add site
       </message>
       <message name="IDS_WEBSITE_SETTINGS_ADD_SITE_DIALOG_TITLE" desc="The title of the dialog to add a website to a list.">
         Add site
       </message>
       <message name="IDS_WEBSITE_SETTINGS_ADD_SITE_ADD_BUTTON" desc="The label for the button to add a website to a list.">
         Add
       </message>
       <message name="IDS_WEBSITE_SETTINGS_ADD_SITE_TOAST" desc="The toast shown when a new site has been added to the whitelist.">
         Site <ph name="SITE_NAME">%1$s<ex>google.com</ex></ph> added
       </message>
       <message name="IDS_WEBSITE_SETTINGS_ADD_SITE_DESCRIPTION_JAVASCRIPT" desc="The description for the allow Javascript for website dialog.">
         Allow JavaScript on websites you specify while blocking it for the rest of the web
       </message>
-      <message name="IDS_WEBSITE_SETTINGS_ADD_SITE_DESCRIPTION_IMAGES" desc="The description for the allow Images on website dialog.">
-        Allow images on websites you specify while blocking them for the rest of the web
-      </message>
       <message name="IDS_WEBSITE_SETTINGS_ADD_SITE_SITE_URL" desc="The label for the input field where the user can type a website URL.">
         Site URL
       </message>
       <message name="IDS_EXAMPLE_URL" desc="The hint for a website url field, showing an example url.">
         www.example.com
       </message>
       <message name="IDS_WEBSITE_SETTINGS_SITE_CATEGORY" desc="The headline above the website name on the website details page.">
         Site
       </message>
       <message name="IDS_WEBSITE_SETTINGS_USAGE_CATEGORY" desc="The headline above the usage stats (how much storage the site is using) on the website details page.">
@@ skipping 655 matching lines @@
       </message>
       <message name="IDS_INFOBAR_MISSING_LOCATION_PERMISSION_TEXT" desc="Text shown in an infobar when a website has requested access to the location capabilities, but Chrome is missing the Android location permission.">
         Chrome needs location access to share it with this site.
       </message>
       <message name="IDS_INFOBAR_MISSING_MULTIPLE_PERMISSIONS_TEXT" desc="Text shown in an infobar when a website has requested access to the multiple restricted capabilities (e.g. location, camera, microphone), but Chrome is missing the corresponding Android permissions.">
         Chrome needs permissions access to share them with this site.
       </message>
       <message name="IDS_INFOBAR_UPDATE_PERMISSIONS_BUTTON_TEXT" desc="Button text shown when Chrome does not have the necessary permission required to complete the requested tasks (e.g. a website has request location information, but Chrome is missing that Android permission).">
         Update permissions
       </message>
-      
+
       <!-- Runtime permission geolocation disclosure strings -->
       <message name="IDS_OMNIBOX_GEOLOCATION_DISCLOSURE" desc="Text shown when a user focuses the Chrome omnibox to inform them that their location will be shared with the search provider to get better local search results.">
         <ph name="SEARCH_ENGINE_URL">%1$s<ex>www.google.com</ex></ph> uses your location to show local search results
       </message>
 
       <!-- ContextMenu -->
       <message name="IDS_CONTEXTMENU_OPEN_IN_NEW_TAB" desc="Context sensitive menu item to open the selected link in a new tab. [CHAR-LIMIT=30]">
         Open in new tab
       </message>
       <message name="IDS_CONTEXTMENU_OPEN_IN_INCOGNITO_TAB" desc="Context sensitive menu item to open the selected link in a new incognito tab. [CHAR-LIMIT=30]">
@@ skipping 1007 matching lines @@
       </message>
       <message name="IDS_HELP_CONTEXT_USAGE_REPORTS" translateable="false">
         send_crash_report
       </message>
       <message name="IDS_HELP_CONTEXT_SAD_TAB" translateable="false">
         mobile_awsnap
       </message>
     </messages>
   </release>
 </grit>