DROP OPERATOR CLASS
Synopsis
Use the DROP OPERATOR CLASS statement to remove an operator class.
Syntax
drop_operator_class ::= DROP OPERATOR CLASS [ IF EXISTS ] 
                        operator_class_name USING index_method 
                        [ CASCADE | RESTRICT ]
Semantics
See the semantics of each option in the [PostgreSQL docs][postgresql-docs-drop-operator-class].
Examples
Basic example.
yugabyte=# CREATE OPERATOR CLASS my_op_class
           FOR TYPE int4
           USING btree AS
           OPERATOR 1 <,
           OPERATOR 2 <=;
yugabyte=# DROP OPERATOR CLASS my_op_class USING btree;