[dotnet] Remove obsolete alert exception ctor overload

Author: nvborisenko

dotnet/src/webdriver/UnhandledAlertException.cs

@@ -91,17 +91,5 @@ public string AlertText
         {
             get { return this.alertText; }
         }
-
-        /// <summary>
-        /// Populates a SerializationInfo with the data needed to serialize the target object.
-        /// </summary>
-        /// <param name="info">The <see cref="SerializationInfo"/> that holds the serialized
-        /// object data about the exception being thrown.</param>
-        /// <param name="context">The <see cref="StreamingContext"/> that contains contextual
-        /// information about the source or destination.</param>
-        public override void GetObjectData(SerializationInfo info, StreamingContext context)
-        {
-            base.GetObjectData(info, context);
-        }
     }
 }