Removed engine->guard, as all relevant calls are made within the context of the same thread
Removed engine->guard, as all relevant calls are made within the context of the same thread

unispeech/unimrcp,AaronZhangL/unimrcp-1,unispeech/unimrcp,AaronZhangL/unimrcp-1,unispeech/unimrcp,AaronZhangL/unimrcp-1