qemu-common.h: Drop WORDS_ALIGNED define

The WORDS_ALIGNED #define is not used anywhere, and hasn't been since
2013 when commit 612d590ebc6cef rewrote the various ld<type>_<endian>_p
functions to not use it. Remove the #define and the comment describing it.
Also remove the line in the comment about TARGET_WORDS_ALIGNED, since
it has never actually existed.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

include/exec/cpu-all.h

@@ -33,15 +33,10 @@
 #define EXCP_YIELD      0x10004 /* cpu wants to yield timeslice to another */
 
 /* some important defines:
- *
- * WORDS_ALIGNED : if defined, the host cpu can only make word aligned
- * memory accesses.
  *
  * HOST_WORDS_BIGENDIAN : if defined, the host cpu is big endian and
  * otherwise little endian.
  *
- * (TARGET_WORDS_ALIGNED : same for target cpu (not supported yet))
- *
  * TARGET_WORDS_BIGENDIAN : same for target cpu
  */
 

include/qemu-common.h

@@ -14,10 +14,6 @@
 
 #include "qemu/fprintf-fn.h"
 
-#if defined(__arm__) || defined(__sparc__) || defined(__mips__) || defined(__hppa__) || defined(__ia64__)
-#define WORDS_ALIGNED
-#endif
-
 #define TFR(expr) do { if ((expr) != -1) break; } while (errno == EINTR)
 
 #include "qemu/option.h"