x86/traps: Remove pointless irq enable from do_spurious_interrupt_bug()

That function returns immediately after conditionally reenabling interrupts which
is more than pointless and requires the ASM code to disable interrupts again.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Reviewed-by: NSean Christopherson <sean.j.christopherson@intel.com>
Reviewed-by: NAlexandre Chartre <alexandre.chartre@oracle.com>
Reviewed-by: NFrederic Weisbecker <frederic@kernel.org>
Reviewed-by: NAndy Lutomirski <luto@kernel.org>
Acked-by: NPeter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20191023123117.871608831@linutronix.de
Link: https://lkml.kernel.org/r/20200225220216.518575042@linutronix.de

arch/x86/kernel/traps.c

@@ -862,7 +862,6 @@ do_simd_coprocessor_error(struct pt_regs *regs, long error_code)
 dotraplinkage void
 do_spurious_interrupt_bug(struct pt_regs *regs, long error_code)
 {
-	cond_local_irq_enable(regs);
 }
 
 dotraplinkage void