Deprecate getColorFromScheme

[kristw]

All calls to this function getColorFromScheme was replaced with getColor or getScale from CategoricalColorNamespace in PR #5815 .

This function was left as a shim in PR #5815, as there were still some components using it. Now all those remaining calls have been removed so there is no need for this shim anymore.

p.s. also enable all unit tests again after .only was left in one of the tests.

@williaster @conglei

[codecov-io]

Codecov Report

Merging #5937 into master will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #5937      +/-   ##
==========================================
- Coverage   63.58%   63.56%   -0.02%     
==========================================
  Files         393      393              
  Lines       23674    23667       -7     
  Branches     2639     2638       -1     
==========================================
- Hits        15053    15044       -9     
- Misses       8608     8610       +2     
  Partials       13       13

Impacted Files	Coverage Δ
superset/assets/src/modules/colors.js	51.72% <ø> (-9.39%)	⬇️
...set/assets/src/modules/colorSchemes/categorical.js	0% <0%> (-100%)	⬇️

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[williaster]

lgtm