Remove redundancy code (#1296) (#1312)

* Remove redundancy code

* Remove blank line

* BitPat supports whitespace and underscores, presumably for human readability.
The BitPat.parse factory though did not remove these from the returned count.
This fixes that adds whitespace and underscores to the unit tests
This is an updated vesion of Chisel PR #1069

Co-authored-by: Chick Markley <chick@qrhino.com>
Co-authored-by: Jim Lawson <ucbjrl@berkeley.edu>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
(cherry picked from commit 160e019e

)

Co-authored-by: Leway Colin <colin4124@gmail.com>