scsi: ufs: qcom: Remove unused variable

A recent change removed the only user of a local variable that needs to now
also be removed:

drivers/ufs/host/ufs-qcom.c: In function 'ufs_qcom_mcq_esi_handler':
drivers/ufs/host/ufs-qcom.c:1652:31: error: unused variable 'host' [-Werror=unused-variable]

Fixes: 8f2b786 ("scsi: ufs: qcom: Get queue ID from MSI index in ESI handler")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/llvm/64c00cd4.630a0220.6ad79.0eac@mx.google.com/
Link: https://lore.kernel.org/r/20230724122029.1430482-1-arnd@kernel.org
Reviewed-by: Abel Vesa <abel.vesa@linaro.org>
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Author: arndb

drivers/ufs/host/ufs-qcom.c

@@ -1649,7 +1649,6 @@ static irqreturn_t ufs_qcom_mcq_esi_handler(int irq, void *data)
 	struct msi_desc *desc = data;
 	struct device *dev = msi_desc_to_dev(desc);
 	struct ufs_hba *hba = dev_get_drvdata(dev);
-	struct ufs_qcom_host *host = ufshcd_get_variant(hba);
 	u32 id = desc->msi_index;
 	struct ufs_hw_queue *hwq = &hba->uhq[id];