BF: Added missing NullHandler to logger in git.remote

[bpoldrack]

Stumbled upon a No handlers could be found for logger "git.remote" message.
Apparently this issue has been addressed in PR #300 already. Back then git/remote.py wasn't included, so here is a one liner to do so.

[codecov-io]

Codecov Report

Merging #666 into master will increase coverage by 1.8%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master     #666     +/-   ##
=========================================
+ Coverage   92.57%   94.38%   +1.8%     
=========================================
  Files          61       61             
  Lines        9968     9970      +2     
=========================================
+ Hits         9228     9410    +182     
+ Misses        740      560    -180

Impacted Files	Coverage Δ
git/test/test_remote.py	97.82% <0%> (ø)	⬆️
git/refs/remote.py	91.13% <0%> (+0.02%)	⬆️
git/compat.py	63.19% <0%> (+0.22%)	⬆️
git/refs/symbolic.py	96.5% <0%> (+0.31%)	⬆️
git/config.py	92.76% <0%> (+0.32%)	⬆️
git/test/test_submodule.py	99.22% <0%> (+0.38%)	⬆️
git/test/test_docs.py	100% <0%> (+0.39%)	⬆️
git/cmd.py	85.54% <0%> (+0.47%)	⬆️
git/repo/base.py	95.82% <0%> (+0.69%)	⬆️
git/exc.py	96.42% <0%> (+1.78%)	⬆️
... and 12 more

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