Net: Remove unnecessary comments
Net: Remove unnecessary table allocation (1/2)

The removed code allocated a table for the subsequent GetIfTable() call,
but because the size given to GetIfTable() was always zero, it failed with
ERROR_INSUFFICIENT_BUFFER and caused the table to be reallocated.
Net: Remove unnecessary table allocation (2/2)

This removes the now unnecessary if block. Split into a separate commit for easier diff.