x86: Remove x86_test_and_clear_bit_percpu()

Upon removal of the "is_idle" flag, x86_test_and_clear_bit_percpu() is no
longer used.

Signed-off-by: Len Brown <len.brown@intel.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: http://lkml.kernel.org/r/b334ae6819507e3dfc0a4b33ed974714d067eb4a.1479449716.git.len.brown@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

arch/x86/include/asm/percpu.h

@@ -507,17 +507,6 @@ do {									\
 
 #endif
 
-/* This is not atomic against other CPUs -- CPU preemption needs to be off */
-#define x86_test_and_clear_bit_percpu(bit, var)				\
-({									\
-	bool old__;							\
-	asm volatile("btr %2,"__percpu_arg(1)"\n\t"			\
-		     CC_SET(c)						\
-		     : CC_OUT(c) (old__), "+m" (var)			\
-		     : "dIr" (bit));					\
-	old__;								\
-})
-
 static __always_inline bool x86_this_cpu_constant_test_bit(unsigned int nr,
                         const unsigned long __percpu *addr)
 {