Revert "Fix bug with resetting context with chatgpt model." (#859)

This reverts commit e0dcf6a14f.

gpt4all-chat/chatllm.cpp

@@ -302,10 +302,6 @@ void ChatLLM::resetResponse()
 void ChatLLM::resetContext()
 {
     regenerateResponse();
-    if (m_isChatGPT && isModelLoaded()) {
-        ChatGPT *chatGPT = static_cast<ChatGPT*>(m_modelInfo.model);
-        chatGPT->setContext(QList<QString>());
-    }
     m_ctx = LLModel::PromptContext();
 }