Remove unnecessary use cases

Author: ocodista

test/fixtures/test-runner/custom_reporters/error_reporter.mjs

@@ -1,25 +1,6 @@
 export default async function* customReporter(source) {
   for await (const event of source) {
-    switch (event.type) {
-      case 'test:start':
-        throw new Error("Custom reporter error")
-      case 'test:pass':
-        yield `test ${event.data.name} passed\n`;
-        break;
-      case 'test:fail':
-        yield `test ${event.data.name} failed\n`;
-        break;
-      case 'test:plan':
-        yield 'test plan';
-        break;
-      case 'test:diagnostic':
-        yield `${event.data.message}\n`;
-        break;
-      case 'test:coverage': {
-        const { totalLineCount } = event.data.summary.totals;
-        yield `total line count: ${totalLineCount}\n`;
-        break;
-      }
-    }
+    if (event.type === 'test:start')
+      throw new Error("Custom reporter error")
   }
 }