Remove recode.rename

[coveralls]

Pull Request Test Coverage Report for Build f45ae2d2719d7f08039e1c5aff730558d58b3737-PR-34

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 24 unchanged lines in 3 files lost coverage.
• Overall coverage decreased (-3.3%) to 89.951%

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Files with Coverage Reduction	New Missed Lines	%
lib/recode/runner/impl.ex	1	89.09%
lib/recode/context.ex	11	82.53%
lib/recode/ast.ex	12	84.15%
<!--	Total:	24		-->

Totals
Change from base Build 53e0d6f34ad2ce6bf9de020316f12d90758e7df5:	-3.3%
Covered Lines:	546
Relevant Lines:	607

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💛 - Coveralls