[oracle@rac1 install]$ pwd
/home/oracle/sqlt/install
[oracle@rac1 install]$ ls -ltr sqdrop.sql
-rw-r--r-- 1 oracle oinstall 1365 Oct 30  2014 sqdrop.sql
[oracle@rac1 install]$

[oracle@rac1 install]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.3.0 Production on Tue Sep 13 19:36:26 2016

Copyright (c) 1982, 2011, Oracle.  All rights reserved.


Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, Automatic Storage Management, OLAP, Data Mining
and Real Application Testing options

SQL> @sqdrop.sql <--

SQL> @sqdrop.sql

PL/SQL procedure successfully completed.

... uninstalling SQLT, please wait
TADOBJ completed.

PL/SQL procedure successfully completed.


SQDOLD completed. Ignore errors from this script

PL/SQL procedure successfully completed.


SQDOBJ completed. Ignore errors from this script

PL/SQL procedure successfully completed.

SQL>
SQL> DECLARE
  2    my_count INTEGER;
  3
  4  BEGIN
  5    SELECT COUNT(*)
  6      INTO my_count
  7      FROM sys.dba_users
  8     WHERE username = 'TRCADMIN'; <---
  9
 10    IF my_count = 0 THEN
 11      BEGIN
 12        EXECUTE IMMEDIATE 'DROP PROCEDURE sys.sqlt$_trca$_dir_set';
 13      EXCEPTION
 14        WHEN OTHERS THEN
 15          DBMS_OUTPUT.PUT_LINE('Cannot drop procedure sys.sqlt$_trca$_dir_set. '||SQLERRM);
 16      END;
 17
 18      FOR i IN (SELECT directory_name
 19                  FROM sys.dba_directories
 20                 WHERE directory_name IN ('SQLT$UDUMP', 'SQLT$BDUMP', 'SQLT$STAGE', 'TRCA$INPUT1', 'TRCA$INPUT2', 'TRCA$STAGE'))
 21      LOOP
 22        BEGIN
 23          EXECUTE IMMEDIATE 'DROP DIRECTORY '||i.directory_name;
 24          DBMS_OUTPUT.PUT_LINE('Dropped directory '||i.directory_name||'.');
 25        EXCEPTION
 26          WHEN OTHERS THEN
 27            DBMS_OUTPUT.PUT_LINE('Cannot drop directory '||i.directory_name||'. '||SQLERRM);
 28        END;
 29      END LOOP;
 30    END IF;
 31  END;
 32  /
Dropped directory TRCA$INPUT2.
Dropped directory TRCA$INPUT1.
Dropped directory SQLT$BDUMP.
Dropped directory SQLT$UDUMP.
Dropped directory TRCA$STAGE.
Dropped directory SQLT$STAGE.

PL/SQL procedure successfully completed.

SQL>
SQL> WHENEVER SQLERROR CONTINUE;
SQL>
SQL> PAU About to DROP users &&tool_repository_schema. and &&tool_administer_schema.. Press RETURN to continue.
About to DROP users SQLTXPLAIN and SQLTXADMIN. Press RETURN to continue.

SQL>
SQL> DROP USER &&tool_administer_schema. CASCADE;
old   1: DROP USER &&tool_administer_schema. CASCADE
new   1: DROP USER SQLTXADMIN CASCADE <---

User dropped.

SQL> DROP USER &&tool_repository_schema. CASCADE;
old   1: DROP USER &&tool_repository_schema. CASCADE
new   1: DROP USER SQLTXPLAIN CASCADE <---

User dropped.

SQL> DROP ROLE &&role_name.;
old   1: DROP ROLE &&role_name.
new   1: DROP ROLE SQLT_USER_ROLE <---

Role dropped.

SQL>
SQL> SET ECHO OFF;

SQDUSR completed.

SQDROP completed.
SQL>