chore: Remove old NVMRC file

[nschonni]

Pointing to v7 which isn't used anymore

[coveralls]

Coverage decreased (-0.5%) to 98.145% when pulling bb7281d on nschonni:patch-1 into 50f8252 on streetsidesoftware:master.

[codecov]

Codecov Report

Merging #279 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #279   +/-   ##
=======================================
  Coverage   98.44%   98.44%           
=======================================
  Files          85       85           
  Lines        3594     3594           
  Branches      688      688           
=======================================
  Hits         3538     3538           
  Misses         53       53           
  Partials        3        3           

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[coveralls]

Coverage decreased (-1.09%) to 97.561% when pulling bb7281d on nschonni:patch-1 into 50f8252 on streetsidesoftware:master.

[coveralls]

Coverage decreased (-3.5%) to 95.161% when pulling bb7281d on nschonni:patch-1 into 50f8252 on streetsidesoftware:master.

[coveralls]

Coverage increased (+1.4%) to 100.0% when pulling bb7281d on nschonni:patch-1 into 50f8252 on streetsidesoftware:master.

[coveralls]

Coverage decreased (-0.6%) to 98.039% when pulling bb7281d on nschonni:patch-1 into 50f8252 on streetsidesoftware:master.

[coveralls]

Coverage increased (+1.4%) to 100.0% when pulling bb7281d on nschonni:patch-1 into 50f8252 on streetsidesoftware:master.

[coveralls]

Coverage decreased (-2.7%) to 95.96% when pulling bb7281d on nschonni:patch-1 into 50f8252 on streetsidesoftware:master.

[coveralls]

Coverage decreased (-3.04%) to 95.608% when pulling bb7281d on nschonni:patch-1 into 50f8252 on streetsidesoftware:master.