call site name from inside signature partial

app/views/notifier/_signature.html.haml

@@ -1,3 +1,5 @@
+- site_name = ENV['GROWSTUFF_SITE_NAME']
+
 %p
   The #{site_name} team.
   %br/

app/views/notifier/crop_request_approved.html.haml

@@ -12,5 +12,5 @@
   %li
     = link_to "Stash seeds for #{@crop.name}", new_seed_url(crop_id: @crop.id)
 
-= render :partial => 'signature', :locals => { :site_name => site_name }
+= render :partial => 'signature'
 

app/views/notifier/crop_request_rejected.html.haml

@@ -6,4 +6,4 @@
 
   = @crop.reason_for_rejection
 
-= render :partial => 'signature', :locals => { :site_name => site_name }
+= render :partial => 'signature'

app/views/notifier/new_crop_request.html.haml

@@ -18,4 +18,4 @@
 %p
   Thanks for your help!
 
-= render :partial => 'signature', :locals => { :site_name => site_name }
+= render :partial => 'signature'

app/views/notifier/notify.html.haml

@@ -20,4 +20,4 @@
   %br/
   = link_to "Turn off these notifications", edit_member_registration_url
 
-= render :partial => 'signature', :locals => { :site_name => site_name }
+= render :partial => 'signature'

app/views/notifier/planting_reminder.html.haml

@@ -59,7 +59,7 @@
 %h2
   See you soon on #{site_name}!
 
-= render :partial => 'signature', :locals => { :site_name => site_name }
+= render :partial => 'signature'
 
 %hr/
 %p