manage-bde -protectors -delete Volume {-Type|-t} {RecoveryPassword| ExternalKey| Certificate| TPM| TPMAndStartupKey| TPMAndPIN| ...

manage-bde -protectors -delete Volume
                       [{-Type|-t} {RecoveryPassword| ExternalKey|
                                    Certificate| TPM| TPMAndStartupKey|
                                    TPMAndPIN| TPMAndPINAndStartupKey|
                                    Password}]
                       [-ID KeyProtectorID]
                       [{-ComputerName|-cn} ComputerName]
                       [{-?|/?}] [{-Help|-h}]

Description:
    Deletes key protection methods. All key protectors are removed unless
    optional parameters are used. To allow continued access to
    BitLocker-encrypted data, deleting the last protector disables all key
    protectors.

Parameter List:
    Volume      A drive letter followed by a colon. Example: "C:"
    -Type or -t Deletes key protectors of a certain type. Optional.
    -id         Deletes the key protector with a certain identifier. Optional.
    -ComputerName or -cn
                Runs on another computer. Examples: "ComputerX", "127.0.0.1"
    -? or /?    Displays brief help. Example: "-ParameterSet -?"
    -Help or -h Displays complete help. Example: "-ParameterSet -h"

Examples:
    manage-bde -protectors -delete C: -id {84E151C1...7A62067A512}
    manage-bde -protectors -delete C: -Type TPMAndStartupKey