Delete (compromised?) cert

As the assumed corresponding private key for this cert is now publicly available, this certificate should not be used.
(in reference to my other pull request.)

web/ssl/demo.vestacp.com.crt

@@ -1,22 +0,0 @@
------BEGIN CERTIFICATE-----
-MIIDmjCCAoICCQCjpzusnGxWaDANBgkqhkiG9w0BAQUFADCBjjELMAkGA1UEBhMC
-VVMxEjAQBgNVBAgMCUJlcmtzaGlyZTESMBAGA1UEBwwJV2VzdG5vcnRoMQ4wDAYD
-VQQKDAVWZXN0YTELMAkGA1UECwwCSVQxGTAXBgNVBAMMEGRlbW8udmVzdGFjcC5j
-b20xHzAdBgkqhkiG9w0BCQEWEGluZm9AdmVzdGFjcC5jb20wHhcNMTExMjE0MTky
-NDU4WhcNMTIxMjEzMTkyNDU4WjCBjjELMAkGA1UEBhMCVVMxEjAQBgNVBAgMCUJl
-cmtzaGlyZTESMBAGA1UEBwwJV2VzdG5vcnRoMQ4wDAYDVQQKDAVWZXN0YTELMAkG
-A1UECwwCSVQxGTAXBgNVBAMMEGRlbW8udmVzdGFjcC5jb20xHzAdBgkqhkiG9w0B
-CQEWEGluZm9AdmVzdGFjcC5jb20wggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEK
-AoIBAQC85/k6Ekfo1z9AfzOFNce0rgy897nlkdiEdr67H05lhFlUHY129vzgrrZC
-kANji9sR0tGwcRdc2aHoTlbQGZ4f567LbWrUY0kc4ku56/5v74akf2P4HRm5AhSF
-6RHJfisl558i/JuO9M+fwCp1r9oOicapcyMJzaSXIeDTudWalKzwCNISH3neA+jw
-uJPFvw+NKtQoYHQN1ag24rmK1IUhdX70HverwS+DJykqEIcTMuON4FZ0UHx8Xr6U
-3pQ9yhulHTQEU03vL353ONJ6SYxzZRnt6GdE+jN+AsSDo0P7mRPoUtvi6n1AeVS+
-iSalLfZN0CEVxuMnjvA1I4DtPNZNAgMBAAEwDQYJKoZIhvcNAQEFBQADggEBAIft
-cXO9VpxvdlItINllvy5jrOVYn/U8NKNO1TNcqeCQmg2PQHfx8WCK4q3RBVV5aAu4
-87h6aTMH1YnxZfMtpMSZZi2FVQgeZsXs86UJu0jYXU06DApyL3G28w2LDwO/m1cw
-8xtMpofALyzmS/YKuGv5ptWCR57mw5a/5fyscWdFc3xgmZZxm/gO1o9pLcotVkLg
-H8dHFcQlqQbp2ejmvJmBdCgkNtgjdrJSVYQGsL1Ja/53S82NQD5LgDBq81kcbvqF
-ikD0BTAwKY6sETo3xCRxfno3A9ZTw7byk/QRl++qK02WrMnDVbcj1xeZR866QIfZ
-plL7FfrMTcBCs1S0Hwc=
------END CERTIFICATE-----