Revert "Windows: cgraph now generating .lib file."
Revert "Windows: cgraph now generating .lib file."

This reverts commit f0a43b2c25ba059b3f082f750fcb4558c0559140.

ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz,ellson/graphviz