Remove CombinatorialClass from skew*

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Removing CombinatorialClass from combinat/skew_partition.py and combinat/skew_tableau.py.

Part of #12913.

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Apply: attachment: trac_14101-remove_cc_skew-ts.patch

Depends on #7983
Depends on #14772
Depends on #13589
Depends on #14907
Depends on #10630

CC: @sagetrac-sage-combinat @zabrocki @nthiery @sagetrac-alubovsky

Component: combinatorics

Keywords: days45, days49

Author: Travis Scrimshaw, Arthur Lubovsky

Reviewer: Travis Scrimshaw, Arthur Lubovsky

Merged: sage-5.12.beta4

Issue created by migration from https://trac.sagemath.org/ticket/14101

[tscrim]

Changed keywords from sage-combinat, days45 to days45

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Reviewer: Travis Scrimshaw, Arthur Lubovsky

[tscrim]

Changed keywords from days45 to days45, days49

[tscrim]

Changed author from Travis Scrimshaw to Travis Scrimshaw, Arthur Lubovsky

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comment:2

The dependency on #14772 is some fuzz due to editing of cython files in symmetrica.

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Dependencies: #14772

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comment:3

There is a minor dependency in integer_vector_weighted.py from #13589.

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Changed dependencies from #14772 to #14772 #13589

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comment:4

Removed fuzz caused by #14907 (I think).