Partially remove `p_max_pu_t` and `timed`
Partially remove `p_max_pu_t` and `timed`

These aren't really necessary and the values can be gotten by other
means instead. Doing so allows us to move the `index = timed` line
towards the loop it is used in, which is in line with the code in the
`else` branch.

openego/eTraGo