static removeUnaryOp(op_name) {
		delete Jsep.unary_ops[op_name];
		if (op_name.length === Jsep.max_unop_len) {
			Jsep.max_unop_len = Jsep.getMaxKeyLen(Jsep.unary_ops);
		}
		return Jsep;
	}
@method removeUnaryOp
@param {string} op_name The name of the unary op to remove
@returns {Jsep}