Small cleanup removing the legacy API in Class_tactics.
Small cleanup removing the legacy API in Class_tactics.

SkySkimmer/coq,ejgallego/coq,Zimmi48/coq,Zimmi48/coq,Zimmi48/coq,SkySkimmer/coq,coq/coq,ejgallego/coq,Zimmi48/coq,SkySkimmer/coq,coq/coq,ejgallego/coq,coq/coq,ejgallego/coq,coq/coq,SkySkimmer/coq