firmware: scmi: optee: fix inline description of PTA_SCMI_CMD_GET_CHANNEL

Removes inaccurate inline description of OP-TEE SCMI PTA command
PTA_SCMI_CMD_GET_CHANNEL.

Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
diff --git a/drivers/firmware/scmi/optee_agent.c b/drivers/firmware/scmi/optee_agent.c
index e76f738..bf0647b 100644
--- a/drivers/firmware/scmi/optee_agent.c
+++ b/drivers/firmware/scmi/optee_agent.c
@@ -91,8 +91,6 @@
 	/*
 	 * PTA_SCMI_CMD_GET_CHANNEL - Get channel handle
 	 *
-	 * SCMI shm information are 0 if agent expects to use OP-TEE regular SHM
-	 *
 	 * [in]     value[0].a: Channel identifier
 	 * [out]    value[0].a: Returned channel handle
 	 * [in]     value[0].b: Requested capabilities mask (enum pta_scmi_caps)