remote trailing comma in recipe

knife test on ruby 1.8.7 was returning
FATAL: Cookbook file recipes/default.rb has a ruby syntax error:
FATAL: /runit/recipes/default.rb:29: syntax error, unexpected ')'
FATAL: /runit/recipes/default.rb:42: syntax error, unexpected kDO_BLOCK, expecting kEND
FATAL:   packages.each do |p|
FATAL:                   ^
FATAL: /runit/recipes/default.rb:43: syntax error, unexpected tIDENTIFIER, expecting kDO or '{' or '('

removed trailing comma in default.rb