Revert "Add 18 missing institutions for AR1 WGIII, Ch5 and Ch6"

An institution, "Ministry of Foreign Affairs" has been inserted
in duplicate as 1436 and 1437.

This reverts commit 9b29e3c91867447db941211ecea1c1763fe8c0db.

Related issue: #50
https://github.com/medea-project/ipcc-database/issues/50