common.h: remove error()

This macro prevents us from using compiletime_error/assert defined
in <linux/compiler.h>.

Now we can remove it, then we will be able to import more BUILD_BUG
macros from Linux.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

include/common.h

@@ -90,11 +90,6 @@ void __assert_fail(const char *assertion, const char *file, unsigned line,
 	({ if (!(x) && _DEBUG) \
 		__assert_fail(#x, __FILE__, __LINE__, __func__); })
 
-#define error(fmt, args...) do {					\
-		printf("ERROR: " pr_fmt(fmt) "\nat %s:%d/%s()\n",	\
-			##args, __FILE__, __LINE__, __func__);		\
-} while (0)
-
 #ifndef BUG
 #define BUG() do { \
 	printf("BUG: failure at %s:%d/%s()!\n", __FILE__, __LINE__, __FUNCTION__); \