Removed ruby_version_is from ARGF specs.
Removed ruby_version_is from BasicObject specs.
Removed ruby_version_is from Bignum specs
Removed ruby_version_is from Binding specs.
Removed ruby_version_is from built-in constants specs.
Removed ruby_version_is from Class specs.
Removed ruby_version_is specs from Comparable.
Removed ruby_version_is from Complex specs.
Removed ruby_version_is from Dir specs.
Removed ruby_version_is from Encoding specs.
Removed ruby_version_is from Enumerable specs.