refactor(client): stop passing around unused data (#57432)

client/utils/gatsby/challenge-page-creator.js

@@ -86,11 +86,6 @@ function getTemplateComponent(challengeType) {
   return views[viewTypes[challengeType]];
 }
 
-function getNextBlock(id, edges) {
-  const next = edges[id + 1];
-  return next ? next.node.challenge.block : null;
-}
-
 exports.createChallengePages = function (createPage) {
   return function ({ node }, index, allChallengeEdges) {
     const {
@@ -104,7 +99,8 @@ exports.createChallengePages = function (createPage) {
       required = [],
       template,
       challengeType,
-      id
+      id,
+      isLastChallengeInBlock
     } = node.challenge;
     // TODO: challengeType === 7 and isPrivate are the same, right? If so, we
     // should remove one of them.
@@ -124,7 +120,7 @@ exports.createChallengePages = function (createPage) {
           isFirstStep: getIsFirstStepInBlock(index, allChallengeEdges),
           template,
           required,
-          nextBlock: getNextBlock(index, allChallengeEdges),
+          isLastChallengeInBlock: isLastChallengeInBlock,
           nextChallengePath: getNextChallengePath(index, allChallengeEdges),
           prevChallengePath: getPrevChallengePath(index, allChallengeEdges),
           id