Remove what_is_this from locale

It got replaced by admin.whats_this.
Changed views to use the new key.

app/views/admin/enterprise_groups/_form_images.html.haml

@@ -14,7 +14,7 @@
       = f.label :promo_image, class: 'with-tip', 'data-powertip' => t(:admin_entreprise_groups_data_powertip_promo_image)
       .with-tip{'data-powertip' => t(:admin_entreprise_groups_data_powertip_promo_image_tip)}
         %a
-          = t 'what_is_this'
+          = t 'admin.whats_this'
       = f.label :promo_image, 'ofn-with-tip' => 'This image is displayed at the top of the Group profile'
       %div{'ofn-with-tip' => 'This image is displayed at the top of the Group profile'}
         %a What's this?

app/views/admin/enterprise_groups/_form_users.html.haml

@@ -5,7 +5,7 @@
       =f.label :owner_id, t(:admin_entreprise_groups_owner)
       .with-tip{'data-powertip' => t(:admin_entreprise_groups_data_powertip)}
         %a
-          = t 'what_is_this'
+          = t 'admin.whats_this'
       =f.label :owner_id, 'Owner'
       %div{'ofn-with-tip' => "The primary user responsible for this group."}
         %a What's this?

app/views/spree/admin/orders/bulk_management.html.haml

@@ -5,7 +5,7 @@
   %h1.page-title
     = t "bom_page_title"
   %a{ 'ofn-with-tip' => "#t('bom_tip')" }
-    = t "what_is_this"
+    = t "admin.whats_this"
 
 = render :partial => 'spree/admin/shared/order_sub_menu'
 

app/views/spree/admin/overview/_order_cycles.html.haml

@@ -7,7 +7,7 @@
         = t "spree_admin_enterprises_create_new"
     - else
       %a.with-tip{ title: t(:spree_admin_order_cycles_tip) }
-        = t "what_is_this"
+        = t "admin.whats_this"
       %a{ "ofn-with-tip" => "Order cycles determine when and where your products are available to customers." } What's this?
   %div.seven.columns.alpha.list
     - if @order_cycle_count > 0

app/views/spree/admin/overview/_products.html.haml

@@ -7,7 +7,7 @@
         = t "spree_admin_enterprises_create_new"
     - else
       %a{ "ofn-with-tip" => "The products that you sell through the Open Food Network." }
-        = t "what_is_this"
+        = t "admin.whats_this"
   %div.seven.columns.alpha.list
     - if @product_count > 0
       %div.seven.columns.alpha.list-item

config/locales/en.yml

@@ -835,7 +835,6 @@ Please follow the instructions there to make your enterprise visible on the Open
   on_hand: "On hand"
   save_changes: "Save Changes"
   update_action: "update()" #FIXME
-  what_is_this: "What's this?"
   spree_admin_overview_enterprises_header: "My Enterprises"
   spree_admin_overview_enterprises_footer: "MANAGE MY ENTERPRISES"
   spree_admin_enterprises_hubs_name: "Name"