highlight: remove author name from docstring

I don't feel this should be part of the documentation. The name of the
original author can of course still be found with 'hg log'.

hgext/highlight/__init__.py

@@ -19,8 +19,6 b' There is a single configuration option:'
 pygments_style = <style>
 
 The default is 'colorful'.
-
--- Adam Hupp <[e-mail]>
 """
 
 import highlight