soc: qcom: remove unused label

The newly added driver comes with a harmless warning:

drivers/soc/qcom/rmtfs_mem.c: In function 'qcom_rmtfs_mem_probe':
drivers/soc/qcom/rmtfs_mem.c:211:1: error: label 'remove_cdev' defined but not used [-Werror=unused-label]

This removes the unused label to avoid the warning.

Fixes: 702baebb8e00 ("soc: qcom: Remote filesystem memory driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>