Revert "list stdlib gem dependencies explicitly"

this causes some gem loading problems, so it's probably not worth it… leaving only base64, which is now required to be listed in Ruby 3.3

Author: mackuba

skyfall.gemspec

@@ -34,12 +34,8 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
 
   spec.add_dependency 'base32', '~> 0.3', '>= 0.3.4'
+  spec.add_dependency 'base64', '~> 0.1'
   spec.add_dependency 'cbor', '~> 0.5', '>= 0.5.9.6'
   spec.add_dependency 'eventmachine', '~> 1.2', '>= 1.2.7'
   spec.add_dependency 'faye-websocket', '~> 0.11'
-
-  spec.add_dependency 'base64', '~> 0.1'
-  spec.add_dependency 'stringio', '~> 3.0'
-  spec.add_dependency 'time', '~> 0.3'
-  spec.add_dependency 'uri', '~> 0.13'
 end