* agent/gpg-agent.c (ASSUAN_SYSTEM_NPTH_IMPL): Remove.
(initialize_modules): Don't call assuan_set_system_hooks.
(main): Don't call assuan_sock_set_system_hooks.
* dirmngr/dirmngr.c (ASSUAN_SYSTEM_NPTH_IMPL): Remove.
(thread_init): Don't call assuan_set_system_hooks.
* g10/gpg.c (ASSUAN_SYSTEM_NPTH_IMPL): Remove.
(main): Don't call assuan_set_system_hooks.
* g13/g13.c (ASSUAN_SYSTEM_NPTH_IMPL): Remove.
(main): Set the syscall clamp with gpgrt_set_syscall_clamp.
Don't call assuan_set_system_hooks.
* kbx/keyboxd.c (ASSUAN_SYSTEM_NPTH_IMPL): Remove.
(initialize_modules): Don't call assuan_set_system_hooks.
(main): Don't call assuan_sock_set_system_hooks.
* scd/scdaemon.c (ASSUAN_SYSTEM_NPTH_IMPL): Remove.
(main): Don't call assuan_set_system_hooks.
* sm/gpgsm.c (ASSUAN_SYSTEM_NPTH_IMPL): Remove.
(main): Don't call assuan_set_system_hooks.
* tpm2d/tpm2daemon.c (ASSUAN_SYSTEM_NPTH_IMPL): Remove.
(main): Don't call assuan_set_system_hooks.