Remove unusused variables

3 files changed, 9 insertions, 14 deletions

diff --git a/activerecord/lib/active_record/attribute_methods/primary_key.rb b/activerecord/lib/active_record/attribute_methods/primary_key.rb
index 8e0b3e1402..51389c84d6 100644
--- a/activerecord/lib/active_record/attribute_methods/primary_key.rb
+++ b/activerecord/lib/active_record/attribute_methods/primary_key.rb
@@ -111,9 +111,8 @@ module ActiveRecord
         #   end
         #   Project.primary_key # => "foo_id"
         def primary_key=(value)
-          @original_primary_key = @primary_key if defined?(@primary_key)
-          @primary_key          = value && value.to_s
-          @quoted_primary_key   = nil
+          @primary_key        = value && value.to_s
+          @quoted_primary_key = nil
         end
       end
     end
diff --git a/activerecord/lib/active_record/locking/optimistic.rb b/activerecord/lib/active_record/locking/optimistic.rb
index 4d73cdd37a..9b2dc096a0 100644
--- a/activerecord/lib/active_record/locking/optimistic.rb
+++ b/activerecord/lib/active_record/locking/optimistic.rb
@@ -133,8 +133,7 @@ module ActiveRecord
 
         # Set the column to use for optimistic locking. Defaults to +lock_version+.
         def locking_column=(value)
-          @original_locking_column = @locking_column if defined?(@locking_column)
-          @locking_column          = value.to_s
+          @locking_column = value.to_s
         end
 
         # The version column used for optimistic locking. Defaults to +lock_version+.
diff --git a/activerecord/lib/active_record/model_schema.rb b/activerecord/lib/active_record/model_schema.rb
index b8764217d3..60bac2f802 100644
--- a/activerecord/lib/active_record/model_schema.rb
+++ b/activerecord/lib/active_record/model_schema.rb
@@ -114,11 +114,10 @@ module ActiveRecord
       # You can also just define your own <tt>self.table_name</tt> method; see
       # the documentation for ActiveRecord::Base#table_name.
       def table_name=(value)
-        @original_table_name = @table_name if defined?(@table_name)
-        @table_name          = value && value.to_s
-        @quoted_table_name   = nil
-        @arel_table          = nil
-        @relation            = Relation.new(self, arel_table)
+        @table_name        = value && value.to_s
+        @quoted_table_name = nil
+        @arel_table        = nil
+        @relation          = Relation.new(self, arel_table)
       end
 
       # Returns a quoted version of the table name, used to construct SQL statements.
@@ -152,8 +151,7 @@ module ActiveRecord
 
       # Sets the value of inheritance_column
       def inheritance_column=(value)
-        @original_inheritance_column = inheritance_column
-        @inheritance_column          = value.to_s
+        @inheritance_column = value.to_s
       end
 
       def sequence_name
@@ -183,8 +181,7 @@ module ActiveRecord
       #     self.sequence_name = "projectseq"   # default would have been "project_seq"
       #   end
       def sequence_name=(value)
-        @original_sequence_name = @sequence_name if defined?(@sequence_name)
-        @sequence_name          = value.to_s
+        @sequence_name = value.to_s
       end
 
       # Indicates whether the table associated with this class exists