The word "Copyright" alone is sufficient to claim copyright, the (c)
symbol need not be present.[1]
As per PEP 263, a Python file with non-ASCII characters must have a
line with "coding: <some-encoding>". Python files containing only
7-bit ASCII characters need no such line.[2]
This commit removes unnecessary Unicode copyright symbols and
unnecessary encoding lines.
[1]: http://www.copyright.gov/circs/circ03.pdf
[2]: http://legacy.python.org/dev/peps/pep-0263/
Closes-Bug: #1324686
Change-Id: Id381ea1f029a0cfddd3773c6d9f16c47842d9c33