mok: remove MokListTrusted from PCR 7

MokListTrusted was added by mistake to PCR 7 in 4e51340. The value of
MokListTrusted does not alter the behavior of secure boot so, as per
https://trustedcomputinggroup.org/wp-content/uploads/TCG_PCClient_PFP_r1p05_v23_pub.pdf#page=36
(section 3.3.4 PCR usage) so it should not be factored in the value of
PCR 7.

See:
  #423
  4e51340

Fixes #484
Fixes #492

mok.c

@@ -178,7 +178,6 @@ struct mok_state_variable mok_state_variable_data[] = {
  EFI_VARIABLE_NON_VOLATILE,
  .no_attr = EFI_VARIABLE_RUNTIME_ACCESS,
  .flags = MOK_MIRROR_DELETE_FIRST |
- MOK_VARIABLE_MEASURE |
  MOK_VARIABLE_INVERSE |
  MOK_VARIABLE_LOG,
  .pcr = 14,