Remove dask dependancy

[benjeffery]

Fixes #1009

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.40%. Comparing base (fac1fec) to head (3939792).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1010   +/-   ##
=======================================
  Coverage   93.40%   93.40%           
=======================================
  Files          18       18           
  Lines        6492     6492           
  Branches     1105     1105           
=======================================
  Hits         6064     6064           
  Misses        291      291           
  Partials      137      137           

Flag	Coverage Δ
C	93.40% <ø> (ø)
python	95.78% <ø> (ø)

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