removed unneeded trace log. Also don't need StudentModuleCache in 'about' section rendering

common/djangoapps/xmodule_modifiers.py

@@ -59,7 +59,6 @@ def replace_static_urls(get_html, prefix, course_namespace=None):
 
     @wraps(get_html)
     def _get_html():
-        logging.debug('in replace_static_urls')
         return replace_urls(get_html(), staticfiles_prefix=prefix, course_namespace = course_namespace)
     return _get_html
 

lms/djangoapps/courseware/courses.py

@@ -146,9 +146,6 @@ def get_course_about_section(course, section_key):
 
             request = get_request_for_thread()
 
-            student_module_cache = StudentModuleCache.cache_for_descriptor_descendents(
-                course.id, request.user, course, depth=2)
-
             loc = course.location._replace(category='about', name=section_key)
             course_module = get_module(request.user, request, loc, None, course.id)