1 files changed, 0 insertions, 14 deletions
diff --git a/lib/arel/table.rb b/lib/arel/table.rb
index 01d4561ff1..fb86c03404 100644
--- a/lib/arel/table.rb
+++ b/lib/arel/table.rb
@@ -17,7 +17,6 @@ module Arel
       @columns = nil
       @aliases = []
       @table_alias = nil
-      @primary_key = nil
 
       if Hash === engine
         @engine  = engine[:engine] || Table.engine
@@ -29,19 +28,6 @@ module Arel
       end
     end
 
-    def primary_key
-      if $VERBOSE
-        warn <<-eowarn
-primary_key (#{caller.first}) is deprecated and will be removed in Arel 4.0.0
-        eowarn
-      end
-      @primary_key ||= begin
-        primary_key_name = @engine.connection.primary_key(name)
-        # some tables might be without primary key
-        primary_key_name && self[primary_key_name]
-      end
-    end
-
     def alias name = "#{self.name}_2"
       Nodes::TableAlias.new(self, name).tap do |node|
         @aliases << node