remoteproc: qcom: wcnss: remove unused qcom_iris_driver declaration

qcom_iris_driver has been removed since
commit 1fcef98 ("remoteproc: qcom: wcnss: Fix race
with iris probe"), so remove it.

Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Reviewed-by: Mukesh Ojha <quic_mojha@quicinc.com>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220911090637.3208939-1-cuigaosheng1@huawei.com

drivers/remoteproc/qcom_wcnss.h

@@ -5,8 +5,6 @@
 struct qcom_iris;
 struct qcom_wcnss;
 
-extern struct platform_driver qcom_iris_driver;
-
 struct wcnss_vreg_info {
 	const char * const name;
 	int min_voltage;