core: remove CacheContents artifact (#16752)

Author: connorjclark

core/config/default-config.js

@@ -114,7 +114,6 @@ const defaultConfig = {
 
     {id: 'Accessibility', gatherer: 'accessibility'},
     {id: 'AnchorElements', gatherer: 'anchor-elements'},
-    {id: 'CacheContents', gatherer: 'cache-contents'},
     {id: 'ConsoleMessages', gatherer: 'console-messages'},
     {id: 'CSSUsage', gatherer: 'css-usage'},
     {id: 'Doctype', gatherer: 'dobetterweb/doctype'},

core/gather/gatherers/cache-contents.js

@@ -44,7 +44,6 @@
     "core/test/config/default-config-test.js",
     "core/test/gather/driver/wait-for-condition-test.js",
     "core/test/gather/gatherers/accessibility-test.js",
-    "core/test/gather/gatherers/cache-contents-test.js",
     "core/test/gather/gatherers/console-messages-test.js",
     "core/test/gather/gatherers/devtools-log-test.js",
     "core/test/gather/gatherers/dobetterweb/optimized-images-test.js",

core/test/gather/gatherers/cache-contents-test.js

@@ -107,8 +107,6 @@ export interface GathererArtifacts extends PublicGathererArtifacts {
   AnchorElements: Artifacts.AnchorElement[];
   /** Errors when attempting to use the back/forward cache. */
   BFCacheFailures: Artifacts.BFCacheFailure[];
-  /** Array of all URLs cached in CacheStorage. */
-  CacheContents: string[];
   /** CSS coverage information for styles used by page's final state. */
   CSSUsage: Crdp.CSS.RuleUsage[];
   /** The log of devtools protocol activity if there was a page load error and Chrome navigated to a `chrome-error://` page. */