Improve removal of i2p

src/freedombone-utils-i2p

     # i2p needs ipv6 to be enabled
     sed -i 's|net.ipv6.conf.all.disable_ipv6.*|net.ipv6.conf.all.disable_ipv6 = 0|g' /etc/sysctl.conf
     /sbin/sysctl -p -q
-    sysctl --system
 
     apt-get update
     apt-get -yq install i2p i2p-keyring
 }
 
 function remove_i2p {
-    apt-get -yq remove i2p i2p-keyring --purge
+    apt-get -yq remove i2p-router --purge
+    apt-get -yq remove i2p --purge
+    apt-get -yq remove i2p-keyring --purge
     apt-get -yq autoremove
 
     # It's assumed here that ipv6 is only needed for i2p
     # This might not be true in future
     sed -i 's|net.ipv6.conf.all.disable_ipv6.*|net.ipv6.conf.all.disable_ipv6 = 1|g' /etc/sysctl.conf
     /sbin/sysctl -p -q
-    sysctl --system
 
     if [ -d /var/lib/i2p ]; then
         rm -rf /var/lib/i2p