terminal-util: remove terminal_vhangup() because apparently unused

src/basic/terminal-util.c

@@ -432,16 +432,6 @@ int terminal_vhangup_fd(int fd) {
         return RET_NERRNO(ioctl(fd, TIOCVHANGUP));
 }
 
-int terminal_vhangup(const char *name) {
-        _cleanup_close_ int fd = -EBADF;
-
-        fd = open_terminal(name, O_RDWR|O_NOCTTY|O_CLOEXEC|O_NONBLOCK);
-        if (fd < 0)
-                return fd;
-
-        return terminal_vhangup_fd(fd);
-}
-
 int vt_disallocate(const char *name) {
         const char *e;
         int r;

src/basic/terminal-util.h

@@ -133,7 +133,6 @@ int acquire_terminal(const char *name, AcquireTerminalFlags flags, usec_t timeou
 int release_terminal(void);
 
 int terminal_vhangup_fd(int fd);
-int terminal_vhangup(const char *name);
 
 int terminal_set_size_fd(int fd, const char *ident, unsigned rows, unsigned cols);
 int proc_cmdline_tty_size(const char *tty, unsigned *ret_rows, unsigned *ret_cols);