Remove remaining unused imports in webkitpy.

third_party/WebKit/Tools/Scripts/webkitpy/w3c/test_parser.py

 # Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
 # are met:
 #
 # 1. Redistributions of source code must retain the above
 #    copyright notice, this list of conditions and the following
 #    disclaimer.
 # 2. Redistributions in binary form must reproduce the above
@@ skipping 11 matching lines @@
 # PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
 # TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
 # THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 # SUCH DAMAGE.
 
 import HTMLParser
 import logging
 import re
 
-from webkitpy.common.host import Host
 from webkitpy.thirdparty.BeautifulSoup import BeautifulSoup
 
 
 _log = logging.getLogger(__name__)
 
 
 class TestParser(object):
 
     def __init__(self, filename, host):
         self.filename = filename
@@ skipping 120 matching lines @@
         href_paths = [href_tag['href'] for href_tag in elements_with_href_attributes]
 
         paths = src_paths + href_paths + urls
         for path in paths:
             if not path.startswith('http:') and not path.startswith('mailto:'):
                 uri_scheme_pattern = re.compile(r'[A-Za-z][A-Za-z+.-]*:')
                 if not uri_scheme_pattern.match(path):
                     support_files.append(path)
 
         return support_files