Remove unused bindings code generators

This patch removes the unused CodeGenerators as well as their tests. I created
this CL by running clean-05-codegenerators.py from pyclean.

TBR=eseidel

git-svn-id: svn://svn.chromium.org/blink/trunk@147578 bbb929c8-8fbe-4397-9dbb-9b2b20218538
170 files changed