Remove circular dependency on test utilities

Author: steveukx

simple-git/package.json

@@ -21,7 +21,6 @@
   "devDependencies": {
     "@kwsites/promise-result": "^1.1.0",
     "@simple-git/babel-config": "^1.0.0",
-    "@simple-git/test-utils": "^4.0.0",
     "@types/debug": "^4.1.5",
     "@types/jest": "^29.2.2",
     "@types/node": "^16",