gpg: default-key: Simply don't limit by capability.
* g10/getkey.c (parse_def_secret_key): Remove the check.
Backport from master commit:
1aa2a0a46dc19e108b79dc129a3b0c5576d14671
- GnuPG-bug-id: T4810
- Fixes-commit: e573e6188dada4d70f6897aa2fda3c3af8c50441
- Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>