Remove automerge action from validate workflow

[jmertic]

NOTE: If you are requesting updates to project or member organization information, please follow the instructions in the README.md file.

Pre-submission checklist:

Please check each of these after submitting your pull request:

• Are you including a repo_url? You need to pick the single best GitHub repository for your project, not a GitHub organization.
• Does the project meet the guidelines for new entries section?
• Have you included a URL for your SVG or added it to hosted_logos and referenced it there?
• Does your logo clearly state the name of the project/product and follow the other logo guidelines?
• Does your project name match the text on the logo?
• Have you verified that the Crunchbase data for your organization is correct (including headquarters and LinkedIn)?
• ~5 minutes after opening the pull request, there will be a link to preview the entry on the staging server. Have you confirmed that it looks good?