Remove deprecated methods in ActionController::Parameters

actionpack/CHANGELOG.md

+*   Remove deprecated methods in `ActionController::Parameters`.
+
+    *Rafael Mendonça França*
+
 *   Remove deprecated support to comparing a `ActionController::Parameters`
     with a `Hash`.
 

actionpack/lib/action_controller/metal/strong_parameters.rb

@@ -611,28 +611,8 @@ def init_with(coder) # :nodoc:
       end
     end
 
-    # Undefine `to_param` such that it gets caught in the `method_missing`
-    # deprecation cycle below.
     undef_method :to_param
 
-    def method_missing(method_sym, *args, &block)
-      if @parameters.respond_to?(method_sym)
-        message = <<-DEPRECATE.squish
-          Method #{method_sym} is deprecated and will be removed in Rails 5.1,
-          as `ActionController::Parameters` no longer inherits from
-          hash. Using this deprecated behavior exposes potential security
-          problems. If you continue to use this method you may be creating
-          a security vulnerability in your app that can be exploited. Instead,
-          consider using one of these documented methods which are not
-          deprecated: http://api.rubyonrails.org/v#{ActionPack.version}/classes/ActionController/Parameters.html
-        DEPRECATE
-        ActiveSupport::Deprecation.warn(message)
-        @parameters.public_send(method_sym, *args, &block)
-      else
-        super
-      end
-    end
-
     protected
       attr_reader :parameters
 

actionpack/test/controller/required_params_test.rb

@@ -72,14 +72,8 @@ class ParametersRequireTest < ActiveSupport::TestCase
     assert params.value?("cinco")
   end
 
-  test "Deprecated methods are deprecated" do
-    assert_deprecated do
-      ActionController::Parameters.new(foo: "bar").merge!(bar: "foo")
-    end
-  end
-
   test "to_query is not supported" do
-    assert_deprecated do
+    assert_raises(NoMethodError) do
       ActionController::Parameters.new(foo: "bar").to_param
     end
   end