Package is no more installable

[echarles]

Since migration to jupyter_packaging, the install from source works fine pip install -e ., but the install does not work anymore pip install . (the folder structure in the lib is empy, jupyter_server can not be imported)

I have tried pip install . with revision 9a64b9d and it is working fine.

Maybe a config must be set to make this work. This has impact on the other project (jupyterlab_server, nbclasssi) consuming the package from github master.

cc/ @Zsailer @blink1073

[Zsailer]

We've removed jupyter-packaging for now.

There is an issue open (#259) to revisit once jupyter-packaging is stable again. Closing this issue in the meantime.