Proposals don't support empty commit links about vulncode-db HOT 2 OPEN

There is also redundant code like if form_submitted and commit["commit_link"]: in the router logic for vulnerabilities and profiles that attempts to validate a commit link once it has been passed. Once this is fixed we should be able to remove such code.

from vulncode-db.

Clearing an existing commit link also requires to remove the respective linked commit entry in the database. So this requires at least the following, separate steps:

• Allowing empty commit links on new/vanilla entries
• Allowing to clear commit links on existing entries
• Removal of commit entries if a commit link was cleared
• Improving the diff code

from vulncode-db.