readme: remove performance sections
readme: remove performance sections

who cares. closes #147
VasylHryha/co,gyson/co,tj/co,abbshr/co,TakayukiSakai/co,gradecam/co,hoozi/co,f0rmat1k/co,Jonekee/co,guangfu/co,cgvarela/co,luxe-eng/valet-express.co