tpm2_listpersistent: remove leftover debugLevel variable
tpm2_listpersistent: remove leftover debugLevel variable

The code using this variable was removed by commit 931a8d597dd9
("tpm2_listpersistent: Port to use common infrastructure.") so
the variable isn't used anymore.

Signed-off-by: Javier Martinez Canillas <8fdf2abf85d34ea8f3f979ef25dc1f25d94aca29@redhat.com>

martinezjavier/tpm2-tools,01org/tpm2.0-tools,01org/tpm2.0-tools,martinezjavier/tpm2-tools,01org/tpm2.0-tools,martinezjavier/tpm2-tools,martinezjavier/tpm2-tools