diff --git a/services/web/app/coffee/Features/Collaborators/CollaboratorsInviteHandler.coffee b/services/web/app/coffee/Features/Collaborators/CollaboratorsInviteHandler.coffee
index 7187f0937f..f3d09effd4 100644
--- a/services/web/app/coffee/Features/Collaborators/CollaboratorsInviteHandler.coffee
+++ b/services/web/app/coffee/Features/Collaborators/CollaboratorsInviteHandler.coffee
@@ -1,85 +1,5 @@
-UserCreator = require('../User/UserCreator')
-Project = require("../../models/Project").Project
-mimelib = require("mimelib")
-logger = require('logger-sharelatex')
-UserGetter = require "../User/UserGetter"
-ContactManager = require "../Contacts/ContactManager"
-CollaboratorsEmailHandler = require "./CollaboratorsEmailHandler"
-Async = require "async"
-PrivilegeLevels = require "../Authorization/PrivilegeLevels"
-Errors = require "../Errors/Errors"
-
 module.experts = CollaboratorsInviteHandler =
 
-	# helpers
-	getMemberIdsWithPrivilegeLevels: (project_id, callback = (error, members) ->) ->
-		Project.findOne { _id: project_id }, { owner_ref: 1, collaberator_refs: 1, readOnly_refs: 1 }, (error, project) ->
-			return callback(error) if error?
-			return callback new Errors.NotFoundError("no project found with id #{project_id}") if !project?
-			members = []
-			members.push { id: project.owner_ref.toString(), privilegeLevel: PrivilegeLevels.OWNER }
-			for member_id in project.readOnly_refs or []
-				members.push { id: member_id.toString(), privilegeLevel: PrivilegeLevels.READ_ONLY }
-			for member_id in project.collaberator_refs or []
-				members.push { id: member_id.toString(), privilegeLevel: PrivilegeLevels.READ_AND_WRITE }
-			return callback null, members
-
-	getMemberIds: (project_id, callback = (error, member_ids) ->) ->
-		CollaboratorsInviteHandler.getMemberIdsWithPrivilegeLevels project_id, (error, members) ->
-			return callback(error) if error?
-			return callback null, members.map (m) -> m.id
-
-	getMembersWithPrivilegeLevels: (project_id, callback = (error, members) ->) ->
-		CollaboratorsInviteHandler.getMemberIdsWithPrivilegeLevels project_id, (error, members = []) ->
-			return callback(error) if error?
-			result = []
-			async.mapLimit members, 3,
-				(member, cb) ->
-					UserGetter.getUser member.id, (error, user) ->
-						return cb(error) if error?
-						if user?
-							result.push { user: user, privilegeLevel: member.privilegeLevel }
-						cb()
-				(error) ->
-					return callback(error) if error?
-					callback null, result
-
-	getMemberIdPrivilegeLevel: (user_id, project_id, callback = (error, privilegeLevel) ->) ->
-		# In future if the schema changes and getting all member ids is more expensive (multiple documents)
-		# then optimise this.
-		CollaboratorsInviteHandler.getMemberIdsWithPrivilegeLevels project_id, (error, members = []) ->
-			return callback(error) if error?
-			for member in members
-				if member.id == user_id?.toString()
-					return callback null, member.privilegeLevel
-			return callback null, PrivilegeLevels.NONE
-
-	getMemberCount: (project_id, callback = (error, count) ->) ->
-		CollaboratorsInviteHandler.getMemberIdsWithPrivilegeLevels project_id, (error, members) ->
-			return callback(error) if error?
-			return callback null, (members or []).length
-
-	getCollaboratorCount: (project_id, callback = (error, count) ->) ->
-		CollaboratorsInviteHandler.getMemberCount project_id, (error, count) ->
-			return callback(error) if error?
-			return callback null, count - 1 # Don't count project owner
-
-	isUserMemberOfProject: (user_id, project_id, callback = (error, isMember, privilegeLevel) ->) ->
-		CollaboratorsInviteHandler.getMemberIdsWithPrivilegeLevels project_id, (error, members = []) ->
-			return callback(error) if error?
-			for member in members
-				if member.id.toString() == user_id.toString()
-					return callback null, true, member.privilegeLevel
-			return callback null, false, null
-
-	getProjectsUserIsCollaboratorOf: (user_id, fields, callback = (error, readAndWriteProjects, readOnlyProjects) ->) ->
-		Project.find {collaberator_refs:user_id}, fields, (err, readAndWriteProjects)=>
-			return callback(err) if err?
-			Project.find {readOnly_refs:user_id}, fields, (err, readOnlyProjects)=>
-				return callback(err) if err?
-				callback(null, readAndWriteProjects, readOnlyProjects)
-
-	# public functions
 	inviteToProject: (projectId, sendingUserId, email, priveleges, callback=(err,invite)->) ->
 
 	revokeInvite: (projectId, inviteId, callback=(err)->) ->