Remove unused stdlib imports

[johannaengland]

In preparation of adding F401 unused imports to ruff

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 66.66667% with 1 line in your changes missing coverage. Please review.

Project coverage is 83.05%. Comparing base (433a93a) to head (a867e03).

Files with missing lines	Patch %	Lines
...rc/argus/notificationprofile/media/sms_as_email.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #973      +/-   ##
==========================================
+ Coverage   82.97%   83.05%   +0.07%     
==========================================
  Files          99       99              
  Lines        4330     4320      -10     
==========================================
- Hits         3593     3588       -5     
+ Misses        737      732       -5     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.