Don't #define SIGINFO.

We don't need it ourselves, and upstream now quietly does nothing on
systems that don't have it.

Also remove a commented-out #define that I accidentally added when
creating this file.

Test: treehugger
Change-Id: I1da53f135949aaeb751ae11ff88a0ca7ce4bf99d
diff --git a/freebsd-compat.h b/freebsd-compat.h
index 5e39c5a..1fdbafe 100644
--- a/freebsd-compat.h
+++ b/freebsd-compat.h
@@ -14,12 +14,6 @@
 // This is used as the size of the write buffer of sectors.
 #define MAXPHYS (1024 * 1024)
 
-//#define static_assert _Static_assert
-
-// TODO: do we actually want this, or should we live without?
-#define SIGINFO SIGUSR2
-
-
 // On glibc, these headers use `__unused` as an identifier, so drag them in
 // first.
 #include <sys/stat.h>