Resolved CodeQL Alert 50 by removing unused variable.

[danajeon]

Fixes #6621

What changes did you make?

• Removed unused variable contactMessage.

Why did you make the changes (we will use this info to test)?

• Change was made because variable is unused, which may lead to performance issues due to wasted computation.

Screenshots of Proposed Changes Of The Website (if any, please do not screen shot code changes)

Modified api-actionnetwork.js file. No visual changes made to website.

[github-actions]

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[roslynwythe]

@danajeon The modified code is used to respond to form submissions on the /Join page. Using the issue branch from this PR, I submitted forms and am attempting to confirm receipt of the email messages.

[ExperimentsInHonesty]

@roslynwythe The original issue for this is here

• Create website routes to survey forms #316
• We need an ER
  • The forms and the spreadsheet, etc will need to be moved by me, and we should discuss how we test in future, which will inform the setup.
  • the info all should get documented in our wiki.

[ExperimentsInHonesty]

@roslynwythe I checked and we got all the form submissions you did.

[roslynwythe]

Great job @danajeon on this issue:

• The analysis and code change are correct
• The PR is well-formed and descriptive
• The changes were tested by confirming that the forms on the Join Us page result in email messages