lk | adds explanatory text to waiting list & disables mark_as_sold button for sold bikes, and removes unused columns

app/views/bikes/edit.html.haml

@@ -3,7 +3,7 @@
     .col-sm-6
       %h1 Edit bike
     .col-sm-3.col-sm-offset-3
-      =button_to "Mark as sold", {action: "mark_as_sold", id: @bike.id}, method: :patch, class: "btn btn-default"
+      =button_to "Mark as sold", {action: "mark_as_sold", id: @bike.id}, method: :patch, class: "btn btn-default", disabled: @bike.sold?
   = render 'edit_form'
   .bottom-nav-links
     - if @previous_bike

app/views/bikes/show.html.haml

@@ -1,7 +0,0 @@
-.container
-  %p#notice= notice
-  = form_for(@bike) do |f|
-    = render 'fields', f: f, disabled: true
-  = link_to 'Edit', edit_bike_path(@bike)
-  |
-  = link_to 'Back', bikes_path