Remove subtitle from Clean up computer trigger

With the introduction of the 3p removal trigger, the concern is that
subtitles make the card too heavy, so we are simply removing them.

I will also send a follow-up CL to remove subtitle from the
"Reset settings" trigger. Not sending here, because I want to add other
people on that change for discussion.

Bug: 816666
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: Iae7c588c72f109e676212ceaf858177b21b22f5d
Reviewed-on: https://chromium-review.googlesource.com/938623
Commit-Queue: Fabio Tirelo <ftirelo@chromium.org>
Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Cr-Commit-Position: refs/heads/master@{#539446}

chrome/app/settings_strings.grdp

@@ -2268,9 +2268,6 @@
     <message name="IDS_SETTINGS_RESET_CLEAN_UP_COMPUTER_TRIGGER" desc="Title for an item in the 'Reset and clean up' section of Chrome Settings. 'Clean up' refers to cleaning up harmful software on the user's computer. Imperative.">
       Clean up computer
     </message>
-    <message name="IDS_SETTINGS_RESET_CLEAN_UP_COMPUTER_TRIGGER_DESCRIPTION" desc="Description of an item in Chrome Settings. Imperative.">
-      Find and remove harmful software
-    </message>
   </if>
 
   <!-- Factory Reset / Powerwash -->

chrome/browser/resources/settings/reset_page/reset_page.html

@@ -64,12 +64,7 @@
         <template is="dom-if" if="[[userInitiatedCleanupsEnabled_]]" restamp>
           <div class="settings-box two-line" id="chromeCleanupSubpageTrigger"
               on-click="onChromeCleanupTap_" actionable>
-            <div class="start">
-              $i18n{resetCleanupComputerTrigger}
-              <div class="secondary" id="chromeCleanupSecondary">
-                $i18n{resetCleanupComputerTriggerDescription}
-              </div>
-            </div>
+            <div class="start">$i18n{resetCleanupComputerTrigger}</div>
             <button id="chromeCleanupArrow" is="paper-icon-button-light"
                 class="subpage-arrow"
                 aria-label="$i18n{resetCleanupComputerTrigger}"

chrome/browser/ui/webui/settings/md_settings_localized_strings_provider.cc

@@ -895,8 +895,6 @@ void AddResetStrings(content::WebUIDataSource* html_source) {
 #if defined(OS_WIN) && defined(GOOGLE_CHROME_BUILD)
     {"resetCleanupComputerTrigger",
      IDS_SETTINGS_RESET_CLEAN_UP_COMPUTER_TRIGGER},
-    {"resetCleanupComputerTriggerDescription",
-     IDS_SETTINGS_RESET_CLEAN_UP_COMPUTER_TRIGGER_DESCRIPTION},
 #endif
   };
   AddLocalizedStringsBulk(html_source, localized_strings,