Remove duplicate draw logic

[thomascobb]

No description provided.

[codecov]

Codecov Report

Merging #45 (513c9b5) into master (800bb03) will increase coverage by 0.36%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master      #45      +/-   ##
==========================================
+ Coverage   95.02%   95.38%   +0.36%     
==========================================
  Files           9        9              
  Lines         904      889      -15     
==========================================
- Hits          859      848      -11     
+ Misses         45       41       -4     

Impacted Files	Coverage Δ
src/scanspec/plot.py	88.65% <ø> (+2.35%)	⬆️
src/scanspec/sphinxext.py	41.17% <0.00%> (-3.27%)	⬇️
src/scanspec/cli.py	90.00% <0.00%> (-0.63%)	⬇️
src/scanspec/service.py	89.88% <0.00%> (-0.33%)	⬇️
src/scanspec/core.py	99.06% <0.00%> (-0.01%)	⬇️
src/scanspec/specs.py	100.00% <0.00%> (ø)

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[thomascobb]

skip-lock builds fail because of wyfo/apischema#316