Hackdna/update fabfile

[hackdna]

Remove a redundant checkout

[mccalluc]

The comment confused me a little bit, because it reads like an if-then, but with the sense reversed from the code... Maybe a comment after instead, something like

# ... but if using Vagrant, current branch is fine.

Not a big deal either way. Thanks!

[codecov]

Codecov Report

Merging #2648 into develop will decrease coverage by 1.58%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           develop   #2648      +/-   ##
==========================================
- Coverage    56.68%   55.1%   -1.59%     
==========================================
  Files          400     400              
  Lines        26881   25231    -1650     
  Branches      1241    1241              
==========================================
- Hits         15238   13903    -1335     
+ Misses       11643   11328     -315

Impacted Files	Coverage Δ
refinery/factory_boy/utils.py	86.95% <0%> (-4.35%)	⬇️
refinery/data_set_manager/models.py	81.12% <0%> (-3.71%)	⬇️
refinery/core/models.py	69.5% <0%> (-3.51%)	⬇️
refinery/data_set_manager/views.py	45.29% <0%> (-2.68%)	⬇️
refinery/core/views.py	27.53% <0%> (-2%)	⬇️
refinery/file_store/models.py	69.69% <0%> (-1.74%)	⬇️
refinery/core/api.py	40.98% <0%> (-0.28%)	⬇️
refinery/data_set_manager/tests.py	99.75% <0%> (-0.01%)	⬇️
refinery/factory_boy/django_model_factories.py	100% <0%> (ø)	⬆️
refinery/core/tests.py	99.5% <0%> (+0.02%)	⬆️
... and 1 more

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