[ruby/stringio] Remove SafeStringValue
SafeStringValue
In Ruby 2.7 and later, it is the same as StringValue.
StringValue
https://github.com/ruby/stringio/commit/561ea67ea8
Added by
[ruby/stringio] Remove
SafeStringValueIn Ruby 2.7 and later, it is the same as
StringValue.https://github.com/ruby/stringio/commit/561ea67ea8