Remove unused webhook

[Godin]

CC @jonahgraham

[github-actions]

Diff for e160ef6:

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+   create
!   modify
!   forced update
-   delete

Organization eclipse-orbit[id=eclipse-orbit]

-   remove repo_webhook[url="https://notify.travis-ci.org", repository="ebr"] {
-     active                                                   = true
-     content_type                                             = "form"
-     events                                                   = [
-       "create"
-       "delete"
-       "issue_comment"
-       "member"
-       "public"
-       "pull_request"
-       "push"
-       "repository"
-     ],
-     insecure_ssl                                             = "0"
-     url                                                      = "https://notify.travis-ci.org"
-   }
  
  Plan: 0 to add, 0 to change, 1 to delete.

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Organization eclipse-orbit[id=eclipse-orbit]

[netomi]

changes are live.