Unnecessary counted variable in Api

[novemberborn]

These lines are unnecessary because counted is never changed from false to true.

• https://github.com/sindresorhus/ava/blob/58e1c561296a409a9557ceb1c7684685404c4278/api.js#L184
• https://github.com/sindresorhus/ava/blob/58e1c561296a409a9557ceb1c7684685404c4278/api.js#L187:L189

I'd remove them myself but there's some other stuff to get to. Writing it down here so I don't forget, but if anybody else wants to chime in please do 🌟

[avivr]

I'd like to give a try

[novemberborn]

@avivr cool!