Get rid of some crufty macros.

These were macros that were never used, or that were only set to one thing and
could be substituted up front.

I left in code guarded by the HAVE_ENDIAN_H and HAVE_LITTLE_ENDIAN macros even
though those are never defined because they guard a reportedly significantly
faster implementation of some functionality, at least according to a comment
in the source. It would be a good idea to enable that code path and see if it
really does make a big difference before removing it entirely.

BUG=None
TEST=Built for Link, Daisy, and the host with FEATURES=test. Built depthcharge
for Link and booted in normal mode.
BRANCH=None

Change-Id: I934a4dd0da169ac018ba07350d56924ab88b1acc
Signed-off-by: Gabe Black <gabeblack@google.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/45687
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Commit-Queue: Gabe Black <gabeblack@chromium.org>
Tested-by: Gabe Black <gabeblack@chromium.org>

firmware/include/sysincludes.h

@@ -25,20 +25,4 @@
 #include <memory.h>
 #endif
 
-#define POSSIBLY_UNUSED __attribute__((unused))
-
-#ifdef __STRICT_ANSI__
-#define INLINE
-#else
-#define INLINE inline
-#endif
-
-#ifndef _MSC_VER
-#define __pragma(...)
-#endif
-
-/* 64-bit operations, for platforms where they need to be function calls */
-#define UINT64_RSHIFT(v, shiftby) (((uint64_t)(v)) >> (shiftby))
-#define UINT64_MULT32(v, multby)  (((uint64_t)(v)) * ((uint32_t)(multby)))
-
 #endif  /* VBOOT_REFERENCE_SYSINCLUDES_H_ */