libssh2_knownhost_del man page
libssh2_knownhost_del — delete a known host entry
int libssh2_knownhost_del(LIBSSH2_KNOWNHOSTS *hosts,
struct libssh2_knownhost *entry);
Delete a known host entry from the collection of known hosts.
entry is a pointer to a struct that you can extract with libssh2_knownhost_check(3) or libssh2_knownhost_get(3).
Returns a regular libssh2 error code, where negative values are error codes and 0 indicates success.
Added in libssh2 1.2
libssh2_knownhost_init(3) libssh2_knownhost_free(3) libssh2_knownhost_add(3) libssh2_knownhost_check(3)