terminal-util: drop unused open_terminal_in_namespace()

With our baseline including TIOCGPTPEER we now systematically
open pty peer through ioctl(), i.e. this sits unused
since 1d522f1a86. Kill it!

src/machine/machine.c

@@ -688,25 +688,6 @@ int machine_openpt(Machine *m, int flags, char **ret_peer) {
         }
 }
 
-int machine_open_terminal(Machine *m, const char *path, int mode) {
-        assert(m);
-
-        switch (m->class) {
-
-        case MACHINE_HOST:
-                return open_terminal(path, mode);
-
-        case MACHINE_CONTAINER:
-                if (!pidref_is_set(&m->leader))
-                        return -EINVAL;
-
-                return open_terminal_in_namespace(&m->leader, path, mode);
-
-        default:
-                return -EOPNOTSUPP;
-        }
-}
-
 static int machine_bus_new(Machine *m, sd_bus_error *error, sd_bus **ret) {
         int r;
 

src/machine/machine.h

@@ -102,7 +102,6 @@ const char* kill_whom_to_string(KillWhom k) _const_;
 KillWhom kill_whom_from_string(const char *s) _pure_;
 
 int machine_openpt(Machine *m, int flags, char **ret_peer);
-int machine_open_terminal(Machine *m, const char *path, int mode);
 int machine_start_getty(Machine *m, const char *ptmx_name, sd_bus_error *error);
 int machine_start_shell(Machine *m, int ptmx_fd, const char *ptmx_name, const char *user, const char *path, char **args, char **env, sd_bus_error *error);
 #define machine_default_shell_path() ("/bin/sh")