In order to be able to delete procedures created by another user you will need to change the share option to 'U' in the relevant PDA procedure table where these procedures are stored.
The PTI.RACR_PROC_1105 procedure table contains the majority of these procedure types as follows:
Procedure - RACR_TYPE
Extract - 1
Report - 2
Action - 3
Object Selection Profile - 6
Prioritize Object Profile - 7
The Share Option column in this table is RACR_SHROPTION.
The PTI.RAEP_PROC_1105 procedure table contains the Execution Procedures.
The Share Option column in this table is RAEP_SHROPTION.