Hi,

Whilst working on the Reproducible Builds effort [0], we noticed that
gwcs could not be built reproducibly.

This is because the binary package ships an .egg-info directory
directly under the dist-packages/ directory, and then the mtimes
of the test data are updated.

Patch attached that simply ensures these files are not shipped in the
binary package.

 [0] https://reproducible-builds.org/


Regards,