fix(log-messages): reduce excessive log messages (#760)

Signed-off-by: AhmedEbrahim <ahmed.a.d.ebrahim@gmail.com>

Author: ahmeddesokyebrahim

autoware_launch/config/control/control_validator/control_validator.param.yaml

@@ -1,8 +1,6 @@
 /**:
   ros__parameters:
 
-    publish_diag: false  # if true, diagnostic msg is published
-
     # If the number of consecutive invalid predicted_path exceeds this threshold, the Diag will be set to ERROR.
     # (For example, threshold = 1 means, even if the predicted_path is invalid, Diag will not be ERROR if
     #  the next predicted_path is valid.)