[configure] Remove unused dll suffix detection.
[configure] Remove unused dll suffix detection.

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