Remove obsolete builds (#16430)

The `brave` and `opera` builds are obsolete; in practice we have been
using the Chrome build for those browsers, because they are based upon
Chromium and are compatible with the Chrome extension API.

development/build/index.js

@@ -71,7 +71,7 @@ async function defineAndRunBuildTasks() {
     version,
   } = await parseArgv();
 
-  const browserPlatforms = ['firefox', 'chrome', 'brave', 'opera'];
+  const browserPlatforms = ['firefox', 'chrome'];
 
   const browserVersionMap = getBrowserVersionMap(browserPlatforms, version);
 

development/metamaskbot-build-announce.js

@@ -38,7 +38,7 @@ async function start() {
   // build the github comment content
 
   // links to extension builds
-  const platforms = ['chrome', 'firefox', 'opera'];
+  const platforms = ['chrome', 'firefox'];
   const buildLinks = platforms
     .map((platform) => {
       const url = `${BUILD_LINK_BASE}/builds/metamask-${platform}-${VERSION}.zip`;

docs/QA_Guide.md

@@ -2,6 +2,7 @@
 
 Steps to mark a full pass of QA complete.
 * Browsers: Opera, Chrome, Firefox, Edge.
+  * Use the Chrome build for all Chromium-derived browsers (e.g. Opera and Edge)
 * OS: Ubuntu, Mac OSX, Windows
 * Load older version of MetaMask and attempt to simulate updating the extension.
 * Open Developer Console in background and popup, inspect errors.