Remove redundant helper from project members index

- logic is duplicate and not necessary.

app/helpers/invite_members_helper.rb

@@ -9,14 +9,6 @@ module InviteMembersHelper
     Feature.enabled?(:invite_members_group_modal, project.group) && can?(current_user, :admin_project_member, project)
   end
 
-  def can_invite_group_for_project?(project)
-    # do not use the can_admin_project_member? helper here due to structure of the view and how membership_locked?
-    # is leveraged for inviting groups
-    Feature.enabled?(:invite_members_group_modal, project.group) &&
-      can?(current_user, :admin_project_member, project) &&
-      project.allowed_to_share_with_group?
-  end
-
   def invite_accepted_notice(member)
     case member.source
     when Project

app/views/projects/project_members/index.html.haml

@@ -3,7 +3,7 @@
 
 .row.gl-mt-3
   .col-lg-12
-    - if can_invite_members_for_project?(@project) || can_invite_group_for_project?(@project)
+    - if can_invite_members_for_project?(@project)
       .row
         .col-md-12.col-lg-6.gl-display-flex
           .gl-flex-direction-column.gl-flex-wrap.align-items-baseline