Remove the sidecond_first flag of apply-related tactics.
Remove the sidecond_first flag of apply-related tactics.

This was dead code.

ejgallego/coq,SkySkimmer/coq,coq/coq,coq/coq,SkySkimmer/coq,Zimmi48/coq,JasonGross/coq,gares/coq,SkySkimmer/coq,ejgallego/coq,SkySkimmer/coq,Zimmi48/coq,Zimmi48/coq,ejgallego/coq,silene/coq,silene/coq,JasonGross/coq,JasonGross/coq,ejgallego/coq,Matafou/coq,gares/coq,Matafou/coq,gares/coq,Matafou/coq,coq/coq,coq/coq,silene/coq,gares/coq,gares/coq,Zimmi48/coq,JasonGross/coq