Remove duplicate

Author: christophfroehlich

joint_trajectory_controller_plugins/src/pid_trajectory_plugin_parameters.yaml

@@ -25,11 +25,6 @@ joint_trajectory_controller_plugins:
         default_value: 0.0,
         description: "Derivative gain :math:`k_d` for PID"
       }
-      i_clamp: {
-        type: double,
-        default_value: 0.0,
-        description: "Integral clamp. Symmetrical in both positive and negative direction."
-      }
       ff_velocity_scale: {
         type: double,
         default_value: 0.0,