removePartProperty Method
Returns a Boolean that represents the successful removal of the specified property for a Web Part. False indicates that the property was not removed.
expression.removePartProperty(strPropName, strPropNamespace)
expression Required. An expression that returns one of the objects in the Applies To list.
strPropName Required String. Specifies the name of the Web Part property.
strPropNamespace Optional String. Specifies the namespace for the Web Part property.