Staging: hv: remove vmbus_loglevel as it is not used at all anymore

As there is no user of this variable, it's time to delete it.  For
dynamic debugging of the hyperv code, use the standard dynamic debug
kernel interface.

Cc: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/hv/vmbus_drv.c

@@ -41,10 +41,6 @@ static struct acpi_device  *hv_acpi_dev;
 
 static struct tasklet_struct msg_dpc;
 static struct tasklet_struct event_dpc;
-
-unsigned int vmbus_loglevel = (ALL_MODULES << 16 | INFO_LVL);
-EXPORT_SYMBOL(vmbus_loglevel);
-
 static struct completion probe_event;
 static int irq;
 
@@ -767,6 +763,5 @@ static int __init hv_acpi_init(void)
 
 MODULE_LICENSE("GPL");
 MODULE_VERSION(HV_DRV_VERSION);
-module_param(vmbus_loglevel, int, S_IRUGO|S_IWUSR);
 
 module_init(hv_acpi_init);

include/linux/hyperv.h

@@ -720,11 +720,6 @@ extern void vmbus_ontimer(unsigned long data);
 							INPUTVSC_DRV|\
 							BLKVSC_DRV)
 
-/* Logging Level */
-#define INFO_LVL				6
-
-extern unsigned int vmbus_loglevel;
-
 struct hv_driver;
 struct hv_device;