Bug 1570997 - Remove fetchCacheDescriptor trait. r=jdescottes.

This was added in Firefox 61, so we can safely remove it now.

Differential Revision: https://phabricator.services.mozilla.com/D40543

--HG--
extra : moz-landing-system : lando

devtools/client/webconsole/webconsole-wrapper.js

@@ -568,15 +568,10 @@ class WebConsoleWrapper {
     // that networkInfo.updates has all we need.
     // Note that 'requestPostData' is sent only for POST requests, so we need
     // to count with that.
-    // 'fetchCacheDescriptor' will also cause a network update and increment
-    // the number of networkInfo.updates
     const NUMBER_OF_NETWORK_UPDATE = 8;
 
     let expectedLength = NUMBER_OF_NETWORK_UPDATE;
-    if (
-      this.webConsoleUI.webConsoleClient.traits.fetchCacheDescriptor &&
-      res.networkInfo.updates.includes("responseCache")
-    ) {
+    if (res.networkInfo.updates.includes("responseCache")) {
       expectedLength++;
     }
     if (res.networkInfo.updates.includes("requestPostData")) {

devtools/server/actors/webconsole.js

@@ -218,7 +218,6 @@ const WebConsoleActor = ActorClassWithSpec(webconsoleSpec, {
     this.traits = {
       transferredResponseSize: true,
       selectedObjectActor: true, // 44+
-      fetchCacheDescriptor: true,
     };
 
     if (this.dbg.replaying && !isWorker) {

devtools/shared/specs/webconsole.js

@@ -16,7 +16,6 @@ types.addDictType("console.traits", {
   evaluateJSAsync: "boolean",
   transferredResponseSize: "boolean",
   selectedObjectActor: "boolean",
-  fetchCacheDescriptor: "boolean",
 });
 
 types.addDictType("console.startlisteners", {