Issue #609 - Removes etag factory from helpers

Fixes also a typo for cache-control.

webcompat/helpers.py

@@ -458,22 +458,11 @@ def api_request(method, path, params=None, data=None):
         abort(404)
 
 
-def make_etag(content):
-    '''Given a string creates an etag value.'''
-    etag = hashlib.md5(content).hexdigest()
-    return etag
-
-
-def set_etag(response, etag):
-    '''Adds etag HTTP header to a response.'''
-    response.headers['Etag'] = etag
-    return response
-
-
 def set_cache_control(response, seconds):
     '''Adds Cache-Control headers with x seconds.
 
     one day = 86400 seconds. The Cache is set as private.
     '''
     caching_header = 'private, max-age={time}'
     response.headers['Cache-Control'] = caching_header.format(time=seconds)
+    return response