Refactor local_environment.rb methods

[hannahramadan]

Many of the methods inside lib/new_relic/local_environment.rb consist of a single if statement. Let's clean up these methods by doing an early return instead.

For example:

def check_for_falcon
-   if defined?(::Falcon::Server) && NewRelic::LanguageSupport.object_space_usable?
+   return unless defined?(::Falcon::Server) && NewRelic::LanguageSupport.object_space_usable?

  @discovered_dispatcher = :falcon if find_class_in_object_space(::Falcon::Server)
end

[workato-integration]

https://new-relic.atlassian.net/browse/NR-212296

[fransan6]

Morning! I can give this a go if it's still an Issue?

[fallwith]

Morning! I can give this a go if it's still an Issue?

Hi @fransan6! Thanks very much for taking a look at this one. I've gone ahead and assigned it to you.