How to delete a Descriptive Flex Field DFF Context

Sometime I'm quite annoyed by the typo mistake when creating a DFF context. The DFF segment screen doesn't allow deletion of context. Fortunately, Oracle has internal API to do such thing. Following is a sample.
--*******************************************
--* Delete a descriptive flexfield
--*******************************************
SET ECHO OFF
SET FEEDBACK OFF
SET SERVEROUTPUT ON SIZE 1000000
DECLARE
  l_application_id                NUMBER := 0;
  l_descriptive_flexfield_name    VARCHAR2(100) :=  'FND_COMMON_LOOKUPS' ;
  l_descriptive_flex_context_cod  VARCHAR2(100) :=  'XFND_CLWW_PURGE_FOLDER';
BEGIN
  --FND_DESCRIPTIVE_FLEXS_PKG --this package is for DFF
  --FND_DESCR_FLEX_CONTEXTS_PKG --this package is for DFF Context
  --FND_DESCR_FLEX_COL_USAGE_PKG --this package is for DFF Column useage
  --When creating a new DFF Context, it will check the DFF Column usage if the context is already used.
  --so when deleting a DFF Context, both the context and column usage should be deleted.
  FOR c IN (SELECT application_column_name
              FROM fnd_descr_flex_column_usages
             WHERE application_id = l_application_id
               AND descriptive_flexfield_name = l_descriptive_flexfield_name
               AND descriptive_flex_context_code = l_descriptive_flex_context_cod)
  LOOP
 
    fnd_descr_flex_col_usage_pkg.delete_row(
         x_application_id                => l_application_id
        ,x_descriptive_flexfield_name    => l_descriptive_flexfield_name
        ,x_descriptive_flex_context_cod  => l_descriptive_flex_context_cod
        ,x_application_column_name       => c.application_column_name
        );
  END LOOP;
  fnd_descr_flex_contexts_pkg.delete_row(
         x_application_id                => l_application_id,
        ,x_descriptive_flexfield_name    => l_descriptive_flexfield_name
        ,x_descriptive_flex_context_cod  => l_descriptive_flex_context_cod
         );
 
  --commit;
end;