Remove superfluous text for transformed time with iteration duration zero

This spec currently includes the following text ...

'If local time < start delay, Return the result of recalculating the
transformed time using a local time less than start delay (e.g.
start delay - 1)'

The text 'using a local time less than start delay' is superfluous, as the
local time is already known to meet to meet this condition. Furthermore, using
'start delay - 1' as suggested can cause problems due to floating point
inaccuracies.

This patch simply removes the superfluous text.

Note that this text was added in c394adf7c659133f01c9bb6893f97025cbd2d1ec