[PATCH REPOST] virt: acrn: Remove unsued acrn_irqfds_mutex.

[Sebastian Andrzej Siewior]

acrn_irqfds_mutex is not used, never was.

Remove acrn_irqfds_mutex.

Fixes: aa3b483ff1d71 ("virt: acrn: Introduce irqfd")
Cc: Fei Li <fei1.li@xxxxxxxxx>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
---

Repost of
   https://lore.kernel.org/all/20210910094708.3430340-1-bigeasy@xxxxxxxxxxxxx/

please apply, it is trivial.

 drivers/virt/acrn/irqfd.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/virt/acrn/irqfd.c
+++ b/drivers/virt/acrn/irqfd.c
@@ -17,7 +17,6 @@
 #include "acrn_drv.h"
 
 static LIST_HEAD(acrn_irqfd_clients);
-static DEFINE_MUTEX(acrn_irqfds_mutex);
 
 /**
  * struct hsm_irqfd - Properties of HSM irqfd