gasmix: stop tracking nitrogen percentages

The only thing you can do with that thing is screw things up (like
libdivecomputer did).  There's no value in tracking the "filler" gas,
since you can always just calculate it from the gases that actually
matter.

So just track Oxygen and Helium - and make sure they have sane values.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 0 insertions, 1 deletions

diff --git a/dive.h b/dive.h
index 0bac6b2b9..bce1fe669 100644
--- a/dive.h
+++ b/dive.h
@@ -66,7 +66,6 @@ typedef struct {
 
 typedef struct {
 	fraction_t o2;
-	fraction_t n2;
 	fraction_t he;
 } gasmix_t;