zephyr: drop IS_ZEPHYR_VERSION macro
As noted in the bug, this macro is an antipattern.  Drop it.
BRANCH=none
TEST=zmake testall
#include "common.h"
#include "system.h"
-#ifdef CONFIG_ZEPHYR
-#include "version.h"
-
-#define IS_ZEPHYR_VERSION(major, minor) \
- (KERNEL_VERSION_MAJOR == (major) && KERNEL_VERSION_MINOR == (minor))
-#else
-#define IS_ZEPHYR_VERSION(major, minor) false
-#endif /* CONFIG_ZEPHYR */
-
#define CROS_EC_IMAGE_DATA_COOKIE1 0xce778899
#define CROS_EC_IMAGE_DATA_COOKIE2 0xceaabbdd
