Removes the linguistic processors for a given layer
        @type layer: string
        @param layer: the name of the layer

def remove_lp(self,layer):
        """
        Removes the linguistic processors for a given layer
        @type layer: string
        @param layer: the name of the layer
        """
        for this_node in self.node.findall('linguisticProcessors'):
            if this_node.get('layer') == layer:
                self.node.remove(this_node)
                break