We attempted to remove things like this and reverted all of them, but I
think nobody relies on this unlike the positional arguments of
`ERB#initialize`.

https://github.com/ruby/erb/commit/92fde7e403

(https://github.com/ruby/erb/pull/34)

There seems to be no way to fix this. It doesn't happen in an installed
directory, so it's likely a false positive and/or a bug in rubygems.

  | <internal:/home/runner/.rubies/ruby-head/lib/ruby/3.2.0+3/rubygems/core_ext/kernel_require.rb>:85: warning: <internal:/home/runner/.rubies/ruby-head/lib/ruby/3.2.0+3/rubygems/core_ext/kernel_require.rb>:85: warning: loading in progress, circular require considered harmful - /home/runner/.rubies/ruby-head/lib/ruby/3.2.0+3/bundler/setup.rb
  | 	from /home/runner/work/erb/erb/libexec/erb:0:in  `require'
  | 	from /home/runner/.rubies/ruby-head/lib/ruby/3.2.0+3/bundler/setup.rb:3:in  `<top (required)>'
  | 	from /home/runner/.rubies/ruby-head/lib/ruby/3.2.0+3/bundler/setup.rb:3:in  `require_relative'
  | 	from /home/runner/.rubies/ruby-head/lib/ruby/3.2.0+3/bundler/shared_helpers.rb:8:in  `<top (required)>'
  | 	from /home/runner/.rubies/ruby-head/lib/ruby/3.2.0+3/bundler/shared_helpers.rb:8:in  `require_relative'
  | 	from /home/runner/.rubies/ruby-head/lib/ruby/3.2.0+3/bundler/rubygems_integration.rb:3:in  `<top (required)>'
  | 	from /home/runner/.rubies/ruby-head/lib/ruby/3.2.0+3/bundler/rubygems_integration.rb:3:in  `require'
  | 	from /home/runner/.rubies/ruby-head/lib/ruby/3.2.0+3/rubygems.rb:1352:in  `<top (required)>'
  | 	from <internal:/home/runner/.rubies/ruby-head/lib/ruby/3.2.0+3/rubygems/core_ext/kernel_require.rb>:85:in  `require'
  | 	from <internal:/home/runner/.rubies/ruby-head/lib/ruby/3.2.0+3/rubygems/core_ext/kernel_require.rb>:85:in  `require'

https://github.com/ruby/erb/commit/65a7c70a00

This reverts commit https://github.com/ruby/erb/commit/5133efa06f0603ae79292f3b2b942957bc8a442e.

While we already handled this deprecation in many libraries, we noticed
that some (e.g. sprockets) relied on the format of `ERB.version` and
https://github.com/ruby/erb/commit/2b4182eb108b9e42fa30bcfa41931896132f88b8 broke such handling.

Given that the `ERB.version` change was released at 3.1 and it's
obviously new, I'll skip this removal in 3.2 and postpone this to a
future version.

[Feature #14256]

https://github.com/ruby/erb/commit/5133efa06f

https://github.com/ruby/erb/commit/012faba2e5

https://github.com/ruby/erb/commit/cb59f11ec8