Add: Delete Columns to Make Sorted

[awesee]

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[codecov-io]

Codecov Report

Merging #248 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master   #248   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files         113    114    +1     
  Lines        1195   1203    +8     
=====================================
+ Hits         1195   1203    +8

Impacted Files	Coverage Δ
...ns-to-make-sorted/delete_columns_to_make_sorted.go	100% <100%> (ø)

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