try:
    from django.conf.urls.defaults import patterns, url
except ImportError:
    from django.conf.urls import patterns, url

from mce_filebrowser import views


urlpatterns = patterns('',
    url(r'^image/$', 
        views.filebrowser, 
        {'file_type': 'img'},
        name='mce-filebrowser-images'
    ),
    url(r'^file/$', 
        views.filebrowser, 
        {'file_type': 'doc'},
        name='mce-filebrowser-documents'
    ),
    url(r'^image/remove/(?P<item_id>\d+)/$', 
        views.filebrowser_remove_file, 
        {'file_type': 'img'},
        name='mce-filebrowser-remove-image'
    ),
    url(r'^file/remove/(?P<item_id>\d+)/$', 
        views.filebrowser_remove_file, 
        {'file_type': 'doc'},
        name='mce-filebrowser-remove-document'
    )
)

try:
    from django.conf.urls.defaults import patterns, url
except ImportError:
    from django.conf.urls import url

from mce_filebrowser import views


urlpatterns = [
    url(r'^image/$', 
        views.filebrowser, 
        {'file_type': 'img'},
        name='mce-filebrowser-images'
    ),
    url(r'^file/$', 
        views.filebrowser, 
        {'file_type': 'doc'},
        name='mce-filebrowser-documents'
    ),
    url(r'^image/remove/(?P<item_id>\d+)/$', 
        views.filebrowser_remove_file, 
        {'file_type': 'img'},
        name='mce-filebrowser-remove-image'
    ),
    url(r'^file/remove/(?P<item_id>\d+)/$', 
        views.filebrowser_remove_file, 
        {'file_type': 'doc'},
        name='mce-filebrowser-remove-document'
    )
]

Update urls.py / remove include() (which is deprecated)