[TCLCORE] warnings as errors for debug builds - good reason?

[Jeff H. <je...@Ac...>]

The default flags for Tcl and TEA have warnings act as errors on
Windows builds (not unix ones).  This may have been important once
upon a time ... but do we really need it anymore?  While we do
strive to not have any warnings in core builds anyway, I don't see
the value in forcing these as errors.

Jeff