AllowToTime attribute may be no longer needed

[nekonenene]

Currently, the Rails/Date cop has the AllowToTime attribute, and its default is true.

https://docs.rubocop.org/rubocop-rails/cops_rails.html#railsdate

This was because DateTime already has the application time zone, therefore using DateTime#to_time method was not a problem.

#288

However, DateTime class has been deprecated since September 2020.

ruby/date@58ca6e6

I think the default of AllowToTime could be false, or we could omit the AllowToTime attribute and always complain to_time to prevent using the system time zone. How about it?

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Expected behavior

rubocop-rails complains to_time with default settings.

Actual behavior

rubocop-rails complains to_time only if the AllowToTime attribute is set to false.

Steps to reproduce the problem

time = "2020-01-01".to_time

RuboCop version

1.23.0 (using Parser 3.0.3.1, rubocop-ast 1.14.0, running on ruby 3.0.3 x86_64-linux)
  - rubocop-rails 2.12.4
  - rubocop-rspec 2.6.0