remove unimplemented tag in swagger doc

Author: nmarklund10

src/api-docs/v2/swagger.json

@@ -136,8 +136,7 @@
       "post": {
         "security": [],
         "tags": [
-          "authentication",
-          "unimplemented"
+          "authentication"
         ],
         "summary": "Authenticates a user.",
         "description": "The system authentication endpoint (NOTE - We should consider switching this to Basic auth, Base64-encoding the email/password).",