Remove some aggregation tests related to composed_of

Since composed_of was removed in 051747449e,
these tests were working "by mistake", due to the matching "address"
string in the error message, but with a different error message than the
expected multiparameter assignment error.

Since "address" is not an attribute from Customer anymore, the error was
"undefined method klass for nil", where nil was supposed to be the
column object.

activerecord/test/cases/base_test.rb

@@ -907,26 +907,6 @@ class BasicsTest < ActiveRecord::TestCase
     end
   end
 
-  def test_multiparameter_assignment_of_aggregation_with_missing_values
-    ex = assert_raise(ActiveRecord::MultiparameterAssignmentErrors) do
-      customer = Customer.new
-      address = Address.new("The Street", "The City", "The Country")
-      attributes = { "address(2)" => address.city, "address(3)" => address.country }
-      customer.attributes = attributes
-    end
-    assert_equal("address", ex.errors[0].attribute)
-  end
-
-  def test_multiparameter_assignment_of_aggregation_with_large_index
-    ex = assert_raise(ActiveRecord::MultiparameterAssignmentErrors) do
-      customer = Customer.new
-      address = Address.new("The Street", "The City", "The Country")
-      attributes = { "address(1)" => "The Street", "address(2)" => address.city, "address(3000)" => address.country }
-      customer.attributes = attributes
-    end
-    assert_equal("address", ex.errors[0].attribute)
-  end
-
   def test_attributes_on_dummy_time
     # Oracle, and Sybase do not have a TIME datatype.
     return true if current_adapter?(:OracleAdapter, :SybaseAdapter)

activerecord/test/models/developer.rb

@@ -64,7 +64,6 @@ class AuditLog < ActiveRecord::Base
   belongs_to :unvalidated_developer, :class_name => 'Developer'
 end
 
-DeveloperSalary = Struct.new(:amount)
 class DeveloperWithBeforeDestroyRaise < ActiveRecord::Base
   self.table_name = 'developers'
   has_and_belongs_to_many :projects, :join_table => 'developers_projects', :foreign_key => 'developer_id'