Fix single-workspace test runner hang

Remove the legacy source-map-support hook that crashes while Mocha formats failures, preventing the CI exit reporter from notifying the bootstrap process.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: eleanorjboyd

src/test/index.ts

@@ -124,9 +124,6 @@ export async function run(): Promise<void> {
     const mocha = new Mocha.default(options);
     const testsRoot = path.join(__dirname);
 
-    // Enable source map support.
-    require('source-map-support').install();
-
     // Ignore `ds.test.js` test files when running other tests.
     const ignoreGlob = options.testFilesSuffix.toLowerCase() === 'ds.test' ? [] : ['**/**.ds.test.js'];
     const testFiles = await new Promise<string[]>((resolve, reject) => {

src/test/testRunner.ts

@@ -45,9 +45,6 @@ export function configure(setupOptions: SetupOptions): void {
 
 export async function run(): Promise<void> {
     const testsRoot = path.join(__dirname);
-    // Enable source map support.
-    require('source-map-support').install();
-
     /**
      * Waits until the Python Extension completes loading or a timeout.
      * When running tests within VSC, we need to wait for the Python Extension to complete loading,