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/lib/rollback_index.c

@@ -38,9 +38,6 @@ uint32_t WriteSpaceKernel(RollbackSpaceKernel *rsk);
 
 static int g_rollback_recovery_mode = 0;
 
-/* disable MSVC warning on const logical expression (as in } while(0);) */
-__pragma(warning (disable: 4127))
-
 #define RETURN_ON_FAILURE(tpm_command) do {				\
 		uint32_t result_;					\
 		if ((result_ = (tpm_command)) != TPM_SUCCESS) {		\
@@ -484,9 +481,6 @@ uint32_t SetupTPM(int recovery_mode, int developer_mode,
 	return TPM_SUCCESS;
 }
 
-/* Disable MSVC warnings on unused arguments */
-__pragma(warning (disable: 4100))
-
 
 #ifdef DISABLE_ROLLBACK_TPM
 /* Dummy implementations which don't support TPM rollback protection */