authHandler/signInResolver backwards compatibility

Signed-off-by: Jamie Klassen <jamie.klassen@broadcom.com>

plugins/auth-backend/package.json

@@ -75,7 +75,6 @@
     "passport-auth0": "^1.4.3",
     "passport-bitbucket-oauth2": "^0.1.2",
     "passport-github2": "^0.1.12",
-    "passport-gitlab2": "^5.0.0",
     "passport-google-oauth20": "^2.0.0",
     "passport-microsoft": "^1.0.0",
     "passport-oauth2": "^1.6.1",