arch:x86:xen: Remove unnecessary assignment in xen_apic_read()

In the function xen_apic_read(), the initialized value of 'ret' is unused
because it will be assigned by the function HYPERVISOR_platform_op(),
thus remove it.

Signed-off-by: jianchunfu <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Boris Ostrovsky <[email protected]>
Signed-off-by: Boris Ostrovsky <[email protected]>

Author: jianchunfu

arch/x86/xen/apic.c

@@ -51,7 +51,7 @@ static u32 xen_apic_read(u32 reg)
 		.interface_version = XENPF_INTERFACE_VERSION,
 		.u.pcpu_info.xen_cpuid = 0,
 	};
-	int ret = 0;
+	int ret;
 
 	/* Shouldn't need this as APIC is turned off for PV, and we only
 	 * get called on the bootup processor. But just in case. */