remove comments for now, b/c they're just placeholders

api/pins.rb

@@ -6,10 +6,3 @@ put "#{APIPREFIX}/threads/:thread_id/unpin" do |thread_id|
   unpin thread
 end
 
-put "#{APIPREFIX}/comments/:comment_id/pin" do |thread_id|
-  pin comment
-end
-
-put "#{APIPREFIX}/comments/:comment_id/unpin" do |thread_id|
-  unpin comment
-end
\ No newline at end of file

models/comment.rb

@@ -15,7 +15,6 @@ class Comment < Content
   field :anonymous, type: Boolean, default: false
   field :anonymous_to_peers, type: Boolean, default: false
   field :at_position_list, type: Array, default: []
-  field :pinned, type: Boolean
 
   index({author_id: 1, course_id: 1})