Removed mention of git submodule in docs

[agstephens]

Simple pull request to add to previous PR. Removes documentation about git submodules. No breaking issues.

[agstephens]

@ellesmith88 sorry, I missed this change in the original PR.

[ellesmith88]

@agstephens I was going to do this but I think the xclim-testdata submodule needs to be initiated for a few json files?

[agstephens]

@ellesmith88 : okay, I hadn't realised that. I'll ask Ouranos...

@Zeitsperre: do you still need the xclim test data as a submodule in the clisops git repo? I think we are ready to dissociate the mini-esgf-data submodule now.

[cehbrecht]

xclim test data is still used in the core:

clisops/tests/core/test_subset.py

Line 12 in 20bbd46

from .._common import XCLIM_TESTS_DATA as TESTS_DATA

Can we replace the test files by our esgf dummy data or add the needed files to our own test-data repo xclim/...?

[Zeitsperre]

@agstephens I was going to do this but I think the xclim-testdata submodule needs to be initiated for a few json files?

If I follow correctly, the JSON files you mention are small enough that they can be gathered via the get_file method as well. For Xclim purposes, they were small enough that we simply loaded them into the library itself (https://github.com/Ouranosinc/xclim/tree/master/tests/testdata).

[ellesmith88]

Closed as already implemented in c3s_mapping branch