chore: remove CircleCI support as no longer necessary

cfg/_cnst.js

@@ -1,6 +1,6 @@
 module.exports = {
   prettierDirs: [
-    'src,scripts,e2e,playwright,docs,cfg,resources,.circleci,.github,public,static,components,content,layouts,pages,plugins,middleware,store,blocks',
+    'src,scripts,e2e,playwright,docs,cfg,resources,.github,public,static,components,content,layouts,pages,plugins,middleware,store,blocks',
   ],
   // ts,tsx,css,scss excluded, cause they need to run in special order (overlap between >1 tool):
   prettierExtensionsExclusive: 'js,jsx,json,md,graphql,yml,yaml,html',

readme.md

@@ -99,7 +99,7 @@ adds `--silent` (and `JEST_SILENT` env var) if all tests are run.
 
 - `test`: runs unit tests (all tests _except_ `*.integration.test.ts` and `*.manual.test.ts`).
   Detects `CI` env variable, adds `--coverage` if in CI. Uses `default` reporter in `!CI`, otherwise
-  `jest-junit` reporter. Includes fix for "CircleCI out of memory issue"
+  `jest-junit` reporter.
 - `test-integration`: runs `*.integration.test.ts` with `jest.integration-test.config.js` config.
 - `test-manual`: runs `*.manual.test.ts` with `jest.manual-test.config.js`.
 - `test-leaks`: runs Jest with `--logHeapUsage --detectOpenHandles --detectLeaks`.

src/util/jest.util.ts

@@ -50,7 +50,6 @@ export function runJest(opt: RunJestOpt = {}): void {
 
   const {
     CI,
-    CIRCLECI,
     CPU_LIMIT,
     TZ = 'UTC',
     APP_ENV,
@@ -97,17 +96,8 @@ export function runJest(opt: RunJestOpt = {}): void {
       args.push('--coverage')
     }
 
-    if (!maxWorkers) {
-      if (cpuLimit && cpuLimit > 1) {
-        maxWorkers = `--maxWorkers=${cpuLimit - 1}`
-      } else if (CIRCLECI) {
-        // We used to default to 2, but due to memory being an issue for Jest - now we default to 1,
-        // as it's the most memory-efficient way
-        // Since `workerIdleMemoryLimit` was introduced by default - we're changing default back to 2 workers
-        // We now only do it for CircleCI (not for CI in general), as it reports cpus as 36
-        // Github Actions don't do that and report correct number of cpus
-        maxWorkers = '--maxWorkers=2'
-      }
+    if (!maxWorkers && cpuLimit && cpuLimit > 1) {
+      maxWorkers = `--maxWorkers=${cpuLimit - 1}`
     }
   }