Remove unused macros from i386 lowlevellock.h.

In the course of the work on six-argument syscalls I noticed that the
i386 lowlevellock.h contained some unused macro definitions (already
unused before my patch).  This patch removes them.

Tested for x86 that installed stripped shared libraries are unchanged
by this patch.

	* sysdeps/unix/sysv/linux/i386/lowlevellock.h (LLL_EBX_LOAD):
	Remove macro.
	(LLL_EBX_REG): Likewise.
	(LLL_ENTER_KERNEL): Likewise.

ChangeLog

@@ -1,5 +1,10 @@
 2015-03-25  Joseph Myers  <joseph@codesourcery.com>
 
+	* sysdeps/unix/sysv/linux/i386/lowlevellock.h (LLL_EBX_LOAD):
+	Remove macro.
+	(LLL_EBX_REG): Likewise.
+	(LLL_ENTER_KERNEL): Likewise.
+
 	* math/auto-libm-test-in: Add more tests of asin.
 	* math/auto-libm-test-out: Regenerated.
 	* sysdeps/i386/fpu/libm-test-ulps: Update.

sysdeps/unix/sysv/linux/i386/lowlevellock.h

@@ -58,24 +58,6 @@
 #define LLL_LOCK_INITIALIZER_WAITERS	(2)
 
 
-#ifdef PIC
-# define LLL_EBX_LOAD	"xchgl %2, %%ebx\n"
-# define LLL_EBX_REG	"D"
-#else
-# define LLL_EBX_LOAD
-# define LLL_EBX_REG	"b"
-#endif
-
-#ifdef I386_USE_SYSENTER
-# ifdef SHARED
-#  define LLL_ENTER_KERNEL	"call *%%gs:%P6\n\t"
-# else
-#  define LLL_ENTER_KERNEL	"call *_dl_sysinfo\n\t"
-# endif
-#else
-# define LLL_ENTER_KERNEL	"int $0x80\n\t"
-#endif
-
 /* Delay in spinlock loop.  */
 #define BUSY_WAIT_NOP	asm ("rep; nop")