Remove MockupChat

[sebinside]

Right now, the MockupChatConnector and Input are completely wrecked. The code was copied from an way earlier version of chat overflow and lack at every point.

A completely new implementation for the new framework is needed, only the parsing might be the same. Also MockupChatOutput etc. should be added.

See: https://github.com/codeoverflow-org/chatoverflow/blob/4e40b6d12f91f24b7d346f993c17a2f8e438d657/src/main/scala/org/codeoverflow/chatoverflow/requirement/service/mockup/MockUpChatConnector.scala

[sebinside]

Right now, the mockup chat is just legacy garbge. should be restarted from scratch, the current version deleted.