update bootstrap hosts

defaults/yacy.network.freeworld.unit

@@ -61,8 +61,7 @@ network.unit.bootstrap.seedlist2 = http://yacyseed.underworld.fr/seed.txt
 network.unit.bootstrap.seedlist3 = http://yacycalou.net:8090/seed.txt
 network.unit.bootstrap.seedlist4 = http://freenode.homeunix.org/yacy/seed.txt
 network.unit.bootstrap.seedlist5 = http://yacy.tschability.ch/seed.txt
-network.unit.bootstrap.seedlist6 = http://buelte.com/share/seed.txt
-network.unit.bootstrap.seedlist7 = http://www1.isg.hamshack.info/seed.txt
+network.unit.bootstrap.seedlist6 = http://www1.isg.hamshack.info/seed.txt
 
 # each network may use different yacy distributions.
 # the auto-updater can access network-specific update locations