Use the deinstall command that is included in Oracle homes to remove Oracle software. Oracle does not support the removal of individual products or components.

• About Oracle Deinstallation Options
  You can stop and remove Oracle Database software and components in an Oracle Database home with the deinstall command.
• Oracle Deinstallation (Deinstall)
  You can run the deinstall command from an Oracle home directory after installation.
• Unlocking and Deinstalling the Previous Release Grid Home
  After upgrading from previous releases, if you want to deinstall the previous release Oracle Grid Infrastructure home, then you must first change the permission and ownership of the previous release Grid home.
• Deinstallation Examples for Oracle Database
  Use these examples to help you understand how to run the deinstall command.
• Deinstallation Response File Example for Oracle Grid Infrastructure for a Cluster
  You can run the deinstall command with the -paramfile option to use the values you specify in the response file.
• Migrating Standalone Oracle Grid Infrastructure Servers to a Cluster
  Follow these steps to migrate an Oracle Database installation using Oracle Restart (that is, an Oracle Grid Infrastructure installation for a standalone server), to server as a cluster member node.
• Changing the Oracle Grid Infrastructure Home Path
  After installing Oracle Grid Infrastructure for a cluster (Oracle Clusterware and Oracle ASM configured for a cluster), if you need to change the Grid home path, then use the following example as a guide to detach the old Grid home, and to attach a new Grid home: