Drop unused tag subscription model.

app/models/tag_subscription.rb

@@ -1,62 +0,0 @@
-class TagSubscription < ApplicationRecord
-  belongs_to :creator, :class_name => "User"
-  validates_presence_of :name, :tag_query, :creator_id
-
-  def migrate_to_saved_searches
-    tag_query.split(/\r\n|\r|\n/).each do |query|
-      creator.saved_searches.create(query: query, labels: [name])
-    end
-  end
-
-  def pretty_name
-    name.tr("_", " ")
-  end
-
-  def pretty_tag_query
-    tag_query_array.join(", ")
-  end
-
-  def tag_query_array
-    tag_query.scan(/[^\r\n]+/).map(&:strip)
-  end
-
-  def editable_by?(user)
-    user.is_moderator? || creator_id == user.id
-  end
-
-  module SearchMethods
-    def visible_to(user)
-      where("(is_public = TRUE OR creator_id = ? OR ?)", user.id, user.is_moderator?)
-    end
-
-    def owned_by(user)
-      where("creator_id = ?", user.id)
-    end
-
-    def name_matches(name)
-      where("lower(name) like ? escape E'\\\\'", name.to_escaped_for_sql_like)
-    end
-
-    def search(params)
-      q = super
-
-      if params[:creator_id]
-        q = q.where("creator_id = ?", params[:creator_id].to_i)
-      elsif params[:creator_name]
-        q = q.where("creator_id = (select _.id from users _ where lower(_.name) = ?)", params[:creator_name].mb_chars.downcase.strip.tr(" ", "_"))
-      else
-        q = q.where("creator_id = ?", CurrentUser.user.id)
-      end
-
-      if params[:name_matches]
-        q = q.name_matches(params[:name_matches].mb_chars.downcase.strip.tr(" ", "_"))
-      end
-
-      q = q.visible_to(CurrentUser.user)
-
-      q.apply_default_order(params)
-    end
-  end
-
-  extend SearchMethods
-end