remove unnecessary variable declarations
declare $parts as array()
remove try-catch around features compile
move "unable to calculate"
operate() does not need $env
correct expected message
remove $env from Anonymous->compile()
remove $env from Color->compile()
remove $env from Dimension->compile()
remove $env from Javascript->compile()
remove unused compile arg
remove $env from UnicodeDescriptor->compile()
remove unused args
remove unused arg
remove unused args from visit*out() methods
remove unused args