drop inconsistent null check
drop inconsistent null check

We do not check dev for null in any of the other functions. If it
was actually null then we would also already have got a null pointer
dereference earlier in the function.

libratbag/libratbag,NoXPhasma/libratbag,cvuchener/libratbag,libratbag/libratbag,libratbag/libratbag,cvuchener/libratbag,whot/libratbag,cvuchener/libratbag,NoXPhasma/libratbag,whot/libratbag,whot/libratbag,NoXPhasma/libratbag