fix(DB/spawn) Remove Earthroot node from Menethil Harbor (#6125)

Deletes misplaced herb spawn.

data/sql/updates/pending_db_world/rev_1622344663132928321.sql

@@ -0,0 +1,4 @@
+INSERT INTO `version_db_world` (`sql_rev`) VALUES ('1622344663132928321');
+
+DELETE FROM `pool_gameobject` WHERE `pool_entry` = 994 AND `guid` = 1962;
+DELETE FROM `gameobject` WHERE `id` = 1619 AND `guid` = 1962;