Revert "Vendor kerchunk netCDF3 reader (#397)" (#408)

Author: maxrjones

docs/releases.rst

@@ -63,7 +63,7 @@ Documentation
 Internal Changes
 ~~~~~~~~~~~~~~~~
 
-- Vendor netCDF3 reader from kerchunk. (:pull:`397`) By `Tom Nicholas <https://github.com/TomNicholas>`_.
+- Add netCDF3 test. (:pull:`397`) By `Tom Nicholas <https://github.com/TomNicholas>`_.
 
 .. _v1.2.0:
 

virtualizarr/readers/netcdf3.py

@@ -26,7 +26,7 @@ def open_virtual_dataset(
         virtual_backend_kwargs: Optional[dict] = None,
         reader_options: Optional[dict] = None,
     ) -> Dataset:
-        from virtualizarr.vendor.kerchunk.netCDF3 import NetCDF3ToZarr
+        from kerchunk.netCDF3 import NetCDF3ToZarr
 
         if virtual_backend_kwargs:
             raise NotImplementedError(
@@ -38,9 +38,6 @@ def open_virtual_dataset(
             loadable_variables,
         )
 
-        if reader_options is None:
-            reader_options = {}
-
         refs = NetCDF3ToZarr(filepath, inline_threshold=0, **reader_options).translate()
 
         # both group=None and group='' mean to read root group