fix(cli): update getPackages to use cleaned yarn output in berry (#7505)

Co-authored-by: Alessandra Davila <aledavila@ibm.com>

Author: joshblack

packages/cli/src/workspace.js

@@ -53,11 +53,7 @@ async function getPackages() {
     'list',
     '--json',
   ]);
-  return JSON.parse(
-    // Clean-up output by stripping out `yarn` information related to the
-    // command and how long it took to run
-    lernaListOutput.split('\n').slice(2, -1).join('\n')
-  ).filter((pkg) => !pkg.private);
+  return JSON.parse(lernaListOutput).filter((pkg) => !pkg.private);
 }
 
 module.exports = {