pyproj and owslib to be removed from the depencies?

[maximlt]

Since the CSWSearch plugin isn't used by EODAG as WEKEO isn't supported.

[sbrunato]

This is related to:

• Add a qgis plugin to eodag #104: because a QGIS plugin may crash due to these dependencies, see PIP dependencies for Python plugins qgis/QGIS-Enhancement-Proposals#202 (comment)
• Update CSW plugin to be compliant with CSW/ISO-[19115 & 19139] #94 and Support partial mirror #15, because even if CSWSearch plugin is not used for the moment, some other providers like CEDA may need it in the future.

What can be done for the moment is to temporally remove these dependencies and the CSWSearch plugin, as the QGIS plugin should be a great feature.

And if we decide to support CEDA, or another provider using CSW, then we should update the CSWSearch plugin to make it work with QGIS.

[sbrunato]

pyproj was removed from OWSLib >=0.27.1 dependencies, and also from eodag in #1021