Removed dependence on pde.tools.spherical

[david-zwicker]

No description provided.

[codecov]

Codecov Report

Merging #9 (91672e8) into master (2126bbb) will decrease coverage by 0.59%.
The diff coverage is 83.06%.

@@            Coverage Diff             @@
##           master       #9      +/-   ##
==========================================
- Coverage   90.00%   89.40%   -0.60%     
==========================================
  Files           8        9       +1     
  Lines        1340     1463     +123     
==========================================
+ Hits         1206     1308     +102     
- Misses        134      155      +21     

Flag	Coverage Δ
unittests	89.40% <83.06%> (-0.60%)	⬇️

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Impacted Files	Coverage Δ
droplets/tools/spherical.py	82.92% <82.92%> (ø)
droplets/droplets.py	92.62% <100.00%> (ø)

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[lgtm-com]

This pull request introduces 1 alert when merging 91672e8 into 2126bbb - view on LGTM.com

new alerts:

• 1 for Unused import