Don't import vector-map from R7RS in SRFI 43.
Don't import vector-map from R7RS in SRFI 43.

Signed-off-by: OGINO Masanori <c49462fef669560e618607913e6c283f7627123c@gmail.com>

koba-e964/picrin,koba-e964/picrin,ktakashi/picrin,ktakashi/picrin,koba-e964/picrin,dcurrie/picrin,ktakashi/picrin,leavesbnw/picrin,leavesbnw/picrin,dcurrie/picrin,omasanori/picrin,picrin-scheme/picrin,picrin-scheme/picrin,omasanori/picrin,leavesbnw/picrin