Remove IA Guide build.yml which was accidentally pulled into the temp…

[camerons]

Fixes Issue: #193

Purpose / why

Remove build.yml accidentally included from IA Guide.

What changes were made?

Replace this text - State clearly the direct additions or modifications made in this change-request.

Verification

After fixing, someone who forks the repo shouldn't receive emails from github with a message like: "[camerons/templates] Run failed: Build - dev (cf13c26)"

Checklist

Pull-request reviewer should ensure the following

• Are issues linked correctly?
• Is this PR labeled correctly?
• If template updates: do they align with developers.google.com/style/?
• Did the PR receive at least one 👍 and no 👎 from core-maintainers?
• On merging, did you complete the merge using keywords?
• On merging, did you add any applicable notes to a draft release and link to this PR?

[Loquacity]

Ah, so you're saying it's in the templates repo, when it needs to be in the site repo? That makes sense now!