refactor: re-implement embed without "unused" import

[catthehacker]

Code clean-up

[codecov]

Codecov Report

Merging #830 (1d4cf7e) into master (0f04942) will increase coverage by 5.30%.
The diff coverage is 62.01%.

@@            Coverage Diff             @@
##           master     #830      +/-   ##
==========================================
+ Coverage   49.27%   54.57%   +5.30%     
==========================================
  Files          23       23              
  Lines        2401     3729    +1328     
==========================================
+ Hits         1183     2035     +852     
- Misses       1090     1540     +450     
- Partials      128      154      +26     

Impacted Files	Coverage Δ
pkg/container/docker_build.go	0.00% <0.00%> (ø)
pkg/container/docker_run.go	6.67% <21.35%> (+4.75%)	⬆️
pkg/common/git.go	49.82% <31.81%> (-9.97%)	⬇️
pkg/model/planner.go	49.78% <42.50%> (+16.70%)	⬆️
pkg/model/workflow.go	52.14% <63.63%> (+26.42%)	⬆️
pkg/container/docker_pull.go	36.36% <64.00%> (+18.18%)	⬆️
pkg/runner/runner.go	74.46% <70.37%> (-2.01%)	⬇️
pkg/runner/expression.go	85.71% <72.09%> (-0.93%)	⬇️
pkg/runner/step_context.go	78.93% <77.60%> (+9.99%)	⬆️
pkg/runner/run_context.go	81.85% <91.08%> (+5.44%)	⬆️
... and 25 more

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