Disable Layout/LineLength cop

Even with the absurd line length limit of 580,
Puppet::Util::CommandLine::Trollop was causing a violation of the
Rubocop Layout/LineLength cop. We have never had this cop enabled before
and enabling it would likely take quite a lot of work, so we'll disable
it entirely for now.

Author: mhashizume

.rubocop_todo.yml

@@ -1492,4 +1492,4 @@ Style/ZeroLengthPredicate:
 # Configuration parameters: AllowHeredoc, AllowURI, URISchemes, IgnoreCopDirectives, AllowedPatterns, IgnoredPatterns.
 # URISchemes: http, https
 Layout/LineLength:
-  Max: 580
+  Enabled: false