Revert "Minimal test harness for iOS (#13029)" (#18631)

This reverts commit 0622b051b63b399838eb7956bed97d76fc8bdf77.
https://dart.googlesource.com/external/github.com/flutter/engine/+/17737e6fd4ec28d83ecc1f159e50f9330f5befb1
1 file changed
tree: 27f2bc0e7e75fbda3f81e3e094c7c0c929b0a55c
  1. commits.json