Cleanup Rakefile by removing unused tasks

Change-Id: I9fbff29c445efadbd0e12a62b86655971da6532f
(cherry picked from commit 8afba7e976bf01bb341c5e648488c237d4889bad)
Disable 80chars/class_parameter_defaults checks

* Disable warnings for "line has more than 80 characters"
* Disable warnings for "parameterised class parameter without a default value"

We do not wish to track warnings for such violations.

Change-Id: Ia6fbb8e7b422f5e73e4746d6b3990c8411d9d4dc
(cherry picked from commit 2044490ef637c5a6359b7db2bdb3bdf0c31fdad2)