Feature: job to manage environment variables now handles remove action

[Guts]

No description provided.

[codecov-commenter]

Codecov Report

Merging #199 (df89c03) into main (e3b1d1d) will decrease coverage by 2.65%.
The diff coverage is 60.86%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #199      +/-   ##
==========================================
- Coverage   63.80%   61.16%   -2.65%     
==========================================
  Files          34       34              
  Lines        1793     1810      +17     
  Branches      379      383       +4     
==========================================
- Hits         1144     1107      -37     
- Misses        543      595      +52     
- Partials      106      108       +2     

Impacted Files	Coverage Δ
qgis_deployment_toolbelt/utils/win32utils.py	63.76% <50.00%> (+2.22%)	⬆️
...loyment_toolbelt/jobs/job_environment_variables.py	78.84% <63.15%> (-13.47%)	⬇️
qgis_deployment_toolbelt/profiles/shortcuts.py	50.52% <0.00%> (-18.23%)	⬇️
qgis_deployment_toolbelt/utils/bouncer.py	50.00% <0.00%> (-10.00%)	⬇️
qgis_deployment_toolbelt/commands/upgrade.py	69.01% <0.00%> (-9.86%)	⬇️
qgis_deployment_toolbelt/constants.py	68.00% <0.00%> (-4.00%)	⬇️