removing unsed import in registry

[gardlt]

• os import is not used

Fixes

Checklist

• I have made a material change to the repo (functionality, testing, spelling, grammar)
• I have read the [Contribution Guide] and my PR follows them.
• I updated my branch with the master branch.
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation about the functionality in the appropriate .md file
• I have added inline documentation to the code I modified

Short description of what this PR does:

• removes unused import

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[SendGridDX]

All committers have signed the CLA.

[codecov-io]

Codecov Report

Merging #494 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff          @@
##           master   #494   +/-   ##
=====================================
  Coverage      83%    83%           
=====================================
  Files          30     30           
  Lines        1024   1024           
  Branches      160    160           
=====================================
  Hits          850    850           
  Misses         84     84           
  Partials       90     90

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[thinkingserious]

Hello @gardlt,

Thanks again for the PR!

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