Remove all rules that match a specified description.

        @description - The description to match against.

        Returns the number of rules removed.

def remove_rules(self, description):
        '''
        Remove all rules that match a specified description.

        @description - The description to match against.

        Returns the number of rules removed.
        '''
        rm = []
        description = description.lower()

        for i in range(0, len(self.extract_rules)):
            if self.extract_rules[i]['regex'].search(description):
                rm.append(i)

        for i in rm:
            self.extract_rules.pop(i)

        return len(rm)