remove deprecated wps providers (attempt 2) (#293)

This is an addition to #292. 

I had mistakenly assumed that notebook outputs would be re-generated if
the inputs were updated but since that is not the case, this makes the
relevant changes to the output cells as well.

docs/source/notebook-components/weaver_example.ipynb

@@ -697,15 +697,6 @@
       " - https://pavics.ouranos.ca/weaver/providers/hummingbird/processes/qa_cfchecker\n",
       " - https://pavics.ouranos.ca/weaver/providers/hummingbird/processes/qa_checker\n",
       " - https://pavics.ouranos.ca/weaver/providers/hummingbird/processes/spotchecker\n",
-      " - https://pavics.ouranos.ca/weaver/providers/malleefowl/processes/custom_workflow\n",
-      " - https://pavics.ouranos.ca/weaver/providers/malleefowl/processes/download\n",
-      " - https://pavics.ouranos.ca/weaver/providers/malleefowl/processes/esgsearch\n",
-      " - https://pavics.ouranos.ca/weaver/providers/malleefowl/processes/persist\n",
-      " - https://pavics.ouranos.ca/weaver/providers/malleefowl/processes/thredds_download\n",
-      " - https://pavics.ouranos.ca/weaver/providers/malleefowl/processes/thredds_opendap_urls\n",
-      " - https://pavics.ouranos.ca/weaver/providers/malleefowl/processes/thredds_urls\n",
-      " - https://pavics.ouranos.ca/weaver/providers/malleefowl/processes/visualize\n",
-      " - https://pavics.ouranos.ca/weaver/providers/malleefowl/processes/workflow\n",
       " - https://pavics.ouranos.ca/weaver/providers/raven/processes/climatology_esp\n",
       " - https://pavics.ouranos.ca/weaver/providers/raven/processes/climpred_hindcast_verification\n",
       " - https://pavics.ouranos.ca/weaver/providers/raven/processes/forecast-floodrisk\n",