intel_idle: Remove unused driver version constant

The INTEL_IDLE_VERSION constant has not been updated since 2020 and serves
no useful purpose. The driver version is implicitly defined by the kernel
version, making this constant redundant.

Remove the constant to eliminate potential confusion about version
tracking.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Link: https://patch.msgid.link/20251215111229.132705-1-dedekind1@gmail.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Author: dedekind

drivers/idle/intel_idle.c

@@ -63,8 +63,6 @@
 #include <asm/fpu/api.h>
 #include <asm/smp.h>
 
-#define INTEL_IDLE_VERSION "0.5.1"
-
 static struct cpuidle_driver intel_idle_driver = {
 	.name = "intel_idle",
 	.owner = THIS_MODULE,
@@ -2478,9 +2476,6 @@ static int __init intel_idle_init(void)
 		return -ENODEV;
 	}
 
-	pr_debug("v" INTEL_IDLE_VERSION " model 0x%X\n",
-		 boot_cpu_data.x86_model);
-
 	intel_idle_cpuidle_devices = alloc_percpu(struct cpuidle_device);
 	if (!intel_idle_cpuidle_devices)
 		return -ENOMEM;