Remove Python 2 utilities and little used utilities

[Rowlando13]

Python2-centric utilities:

• getchar
• get_binary_stream
• get_text_stream

Little used Utilities:

• wrap_text

In the interest of making more time to focus on core click details, these utilities are planned to be deprecated in the next feature release, and removed from the public api in one after. If any of these are critical to your uses, please explain below, and we may consider other options.

[Rowlando13]

@kdeldycke @davidism Any others to consider?