3 files changed, 2 insertions, 15 deletions
diff --git a/activerecord/lib/arel/nodes/node.rb b/activerecord/lib/arel/nodes/node.rb
index 2b9b1e9828..8086102bde 100644
--- a/activerecord/lib/arel/nodes/node.rb
+++ b/activerecord/lib/arel/nodes/node.rb
@@ -8,16 +8,6 @@ module Arel # :nodoc: all
       include Arel::FactoryMethods
       include Enumerable
 
-      if $DEBUG
-        def _caller
-          @caller
-        end
-
-        def initialize
-          @caller = caller.dup
-        end
-      end
-
       ###
       # Factory method to create a Nodes::Not node that has the recipient of
       # the caller as a child.
diff --git a/activerecord/lib/arel/nodes/select_core.rb b/activerecord/lib/arel/nodes/select_core.rb
index 2defe61974..73461ff683 100644
--- a/activerecord/lib/arel/nodes/select_core.rb
+++ b/activerecord/lib/arel/nodes/select_core.rb
@@ -3,13 +3,12 @@
 module Arel # :nodoc: all
   module Nodes
     class SelectCore < Arel::Nodes::Node
-      attr_accessor :top, :projections, :wheres, :groups, :windows
+      attr_accessor :projections, :wheres, :groups, :windows
       attr_accessor :havings, :source, :set_quantifier
 
       def initialize
         super()
         @source         = JoinSource.new nil
-        @top            = nil
 
         # https://ronsavage.github.io/SQL/sql-92.bnf.html#set%20quantifier
         @set_quantifier = nil
@@ -43,7 +42,7 @@ module Arel # :nodoc: all
 
       def hash
         [
-          @source, @top, @set_quantifier, @projections,
+          @source, @set_quantifier, @projections,
           @wheres, @groups, @havings, @windows
         ].hash
       end
@@ -51,7 +50,6 @@ module Arel # :nodoc: all
       def eql?(other)
         self.class == other.class &&
           self.source == other.source &&
-          self.top == other.top &&
           self.set_quantifier == other.set_quantifier &&
           self.projections == other.projections &&
           self.wheres == other.wheres &&
diff --git a/activerecord/lib/arel/nodes/unary.rb b/activerecord/lib/arel/nodes/unary.rb
index a3c0045897..00639304e4 100644
--- a/activerecord/lib/arel/nodes/unary.rb
+++ b/activerecord/lib/arel/nodes/unary.rb
@@ -37,7 +37,6 @@ module Arel # :nodoc: all
       On
       Ordering
       RollUp
-      Top
     }.each do |name|
       const_set(name, Class.new(Unary))
     end