Remove rubocop dependency

Author: mullermp

gems/smithy/smithy.gemspec

@@ -12,7 +12,6 @@ Gem::Specification.new do |spec|
   spec.executables  = ['smithy-ruby']
 
   spec.add_dependency('railties', '~> 8.0')
-  spec.add_dependency('rubocop')
   spec.add_dependency('smithy-client', '1.0.0.pre1')
 
   spec.required_ruby_version = '>= 3.3'