firmware: qcom: scm: remove unused __qcom_scm_init declaration

__qcom_scm_init has been removed since
commit 9a434cee ("firmware: qcom_scm: Dynamically support
SMCCC and legacy conventions"), so remove it.
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220911092912.3219132-1-cuigaosheng1@huawei.com

drivers/firmware/qcom_scm.h

@@ -129,8 +129,6 @@ extern int scm_legacy_call(struct device *dev, const struct qcom_scm_desc *desc,
 #define QCOM_SCM_SMMU_CONFIG_ERRATA1		0x03
 #define QCOM_SCM_SMMU_CONFIG_ERRATA1_CLIENT_ALL	0x02
 
-extern void __qcom_scm_init(void);
-
 /* common error codes */
 #define QCOM_SCM_V2_EBUSY	-12
 #define QCOM_SCM_ENOMEM		-5