Remove a dead store.
Remove a dead store.

ccc-analyzer noticed:

Bug Group	Bug Type	File		Function/Method	Line	Path Length
Dead store	Dead increment	linux-nvme.c	parse_nvme	89	1

Which is a "sz += ..." I accidentally left in when I switched all the
file path parsers to just using the string pointer "current" and
subtracting it from "path" at the end.

Signed-off-by: Peter Jones <2e0a021e603479ff81838c00c3b770daca4e0214@redhat.com>

rhinstaller/efivar,rhboot/efivar,vathpela/efivar-devel,rhinstaller/efivar,rhboot/efivar