Hi! What is the purpose of this PR?
(backports author here...)
Please avoid calling require 'backports' and instead require the needed backports individually.
In the case of Sinatra, I don't think there are any being used though.

@marcandre The purpose of this PR is to revert #1208 as described.
As a matter of fact, you can say that your point is correct, but I think that you should rollback this change according to git's workflow.

@marcandre I have just sent a PR to lock the version of the backports gem. As backports features, try and underscore have been used in sinatra-contrib.

try and underscore are not really backports, they are part of ActiveSupport
Would you consider instead requiring them from ActiveSupport instead? Having those in backports was a mistake, even when they used to not be available independently.

Otherwise, at the very least, do not require the whole suite of backports, but just those that are required. I can provide a PR if need be.

@namusyaka what was the reason to revert #1208?

@dentarg See #1208 (comment)
The change potentially breaks backward compatibility.