dtext: refactor parsing of embedded BUR pseudo tags.

app/models/bulk_update_request.rb

@@ -137,14 +137,6 @@ class BulkUpdateRequest < ApplicationRecord
   include ApprovalMethods
   include ValidationMethods
 
-  concerning :EmbeddedText do
-    class_methods do
-      def embedded_pattern
-        /\[bur:(?<id>\d+)\]/m
-      end
-    end
-  end
-
   def editable?(user)
     user_id == user.id || user.is_builder?
   end

app/models/tag_alias.rb

@@ -33,14 +33,6 @@ class TagAlias < TagRelationship
   include ApprovalMethods
   include ForumMethods
 
-  concerning :EmbeddedText do
-    class_methods do
-      def embedded_pattern
-        /\[ta:(?<id>\d+)\]/m
-      end
-    end
-  end
-
   def self.to_aliased(names)
     names = Array(names).map(&:to_s)
     return [] if names.empty?

app/models/tag_implication.rb

@@ -191,14 +191,6 @@ class TagImplication < TagRelationship
   include ValidationMethods
   include ApprovalMethods
 
-  concerning :EmbeddedText do
-    class_methods do
-      def embedded_pattern
-        /\[ti:(?<id>\d+)\]/m
-      end
-    end
-  end
-
   def reload(options = {})
     flush_cache
     super

app/models/tag_relationship.rb

@@ -177,14 +177,6 @@ class TagRelationship < ApplicationRecord
     end
   end
 
-  concerning :EmbeddedText do
-    class_methods do
-      def embedded_pattern
-        raise NotImplementedError
-      end
-    end
-  end
-
   def antecedent_and_consequent_are_different
     if antecedent_name == consequent_name
       errors[:base] << "Cannot alias or implicate a tag to itself"