fix(learn): tests for python video lessons (#38600)

* fix: improve tests for video challenges

* fix: remove unused challenges + get rid of no description warning

* fix: remove non-existent challenges from meta

client/plugins/fcc-source-challenges/create-challenge-nodes.js

@@ -1,7 +1,10 @@
 const crypto = require('crypto');
 
 function createChallengeNode(challenge, reporter) {
-  if (typeof challenge.description[0] !== 'string') {
+  if (
+    typeof challenge.description[0] !== 'string' &&
+    challenge.challengeType !== 11
+  ) {
     reporter.warn(`
 
     ${challenge.title} has a description that will break things!