math: remove unused macro.

* arith.c (NOOP): Unused macro removed. This is a leftover
from a code generation system that only existed over the
weekend of December 10-11, 2011.  A file called arith.txr was
used to generate arith.c. One case in the minus function
required negating the result due to the reversed operands. The
code was generated by a template common with plus, but plus
didn't need the negation, due to being commutative, so the
code generated for plus called the NOOP macro in the same
place where minus called mp_neg. Just a few hours after
removing arith.txr, I changed the plus code by hand such that
the NOOP macro was not called, without removing the macro.
Good grief.

1 files changed, 0 insertions, 1 deletions

diff --git a/arith.c b/arith.c
index 2bfda382..fc3f80ce 100644
--- a/arith.c
+++ b/arith.c
@@ -54,7 +54,6 @@
 #define max(a, b) ((a) > (b) ? (a) : (b))
 
 #define TAG_PAIR(A, B) ((A) << TAG_SHIFT | (B))
-#define NOOP(A, B)
 #define CNUM_BIT ((int) sizeof (cnum) * CHAR_BIT)
 #define ABS(A) ((A) < 0 ? -(A) : (A))