Deprecate windowslinetermination from libcudf read_csv

[lithomas1]

It doesn't do anything (there are only getters and setters for it defined in the csv header file, but it is not used in the csv reader cuda files).

See Github code search link
https://github.com/search?q=repo%3Arapidsai%2Fcudf%20windowslinetermination&type=code

[yytsui]

First time here , I would like working on this to get familiar with the contribution working flow.

[vyasr]

@yytsui apologies for the slow response! Please do, we'd love to have your help. Let us know if you have any issues getting started! I would recommend trying out the devcontainers as an easy starting point.