Remove the Twitter (X) option from the social authentications install step

Problem/Motivation

The Varbase install "Social authentications to enable" step still offers a Twitter checkbox (social_auth_twitter), but social_auth_twitter was dropped from varbase_auth on the 9.2.x line. Selecting it tries to install a module that is not available.

Steps to reproduce

1. Install Varbase 9.2.x and reach the Social authentications to enable step.
2. A Twitter option is listed alongside Google, Facebook and Linkedin.

Proposed resolution

Remove the social_auth_twitter checkbox from src/FormBit/varbase_auth.formbit.php, leaving Google, Facebook and Linkedin.

Remaining tasks

• ✅ File an issue about this project
• ✅ Addition/Change/Update/Fix to this project
• ✅ Testing to ensure no regression
• ➖ Automated unit/functional testing coverage
• ➖ Developer Documentation support on feature change/addition
• ➖ User Guide Documentation support on feature change/addition
• ➖ UX/UI designer responsibilities
• ➖ Accessibility and Readability
• ✅ Reviewed by a human
• ✅ Code review by maintainers
• ✅ Full testing and approval
• ✅ Credit contributors
• ✅ Review with the product owner
• ✅ Update Release Notes
• ✅ Release varbase-9.2.0

User interface changes

• Twitter is no longer offered in the social-auth install step.

API changes

• N/A

Data model changes

• N/A

Release notes snippet

• fix: #3608518 Remove the Twitter (X) option from the social authentications install step