fix(query-runner): replace .off with .removeListener (gatsbyjs#10613)

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## Description

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This fixes a bug introduced in gatsbyjs#10593 by replacing the `.off` call with `.removeListener`. `.off` was introduced in Node v10.0.0 as an alias for `.removeListener` (nodejs/node#17156).

## Related Issues

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  Link to the issue that is fixed by this PR (if there is one)
  e.g. Fixes gatsbyjs#1234, Addresses gatsbyjs#1234, Related to gatsbyjs#1234, etc.
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Related to gatsbyjs#10612

packages/gatsby/src/internal-plugins/query-runner/page-query-runner.js

@@ -163,7 +163,7 @@ const runQueriesForPathnames = pathnames => {
 
   return new Promise(resolve => {
     const onDrain = () => {
-      queue.off(`drain`, onDrain)
+      queue.removeListener(`drain`, onDrain)
       resolve()
     }
     queue.on(`drain`, onDrain)