MySQL 5.5 removal after 5.6 upgrade

root@hydrogen:/server/backup/custom# apt-get autoremove
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
  mysql-client-5.5 mysql-server-5.5 mysql-server-core-5.5
0 upgraded, 0 newly installed, 3 to remove and 1 not upgraded.
After this operation, 90.4 MB disk space will be freed.
Do you want to continue [Y/n]? Y
(Reading database ... 26560 files and directories currently installed.)
Removing mysql-server-5.5 ...
Stopping MySQL database server: mysqld.
Removing mysql-client-5.5 ...
Removing mysql-server-core-5.5 ...
Processing triggers for man-db ...

root@hydrogen:/server/backup/custom# /etc/init.d/mysql start
Starting MySQL database server: mysqldNo directory, logging in with HOME=/
.
Checking for tables which need an upgrade, are corrupt or were
not closed cleanly..

root@hydrogen:/server/backup/custom# dpkg --list | grep -v ^ii
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name                               Version                    Architecture Description
+++-==================================-==========================-============-==========================================================================
rc  mysql-server-5.5                   5.5.35+dfsg-0+wheezy1      amd64        MySQL database server binaries and system database setup

root@hydrogen:/server/backup/custom# dpkg --purge mysql-server-5.5
(Reading database ... 26527 files and directories currently installed.)
Removing mysql-server-5.5 ...
Purging configuration files for mysql-server-5.5 ...
Stopping MySQL database server: mysqld.

root@hydrogen:/server/backup/custom# /etc/init.d/mysql start
Starting MySQL database server: mysqldNo directory, logging in with HOME=/
.
Checking for tables which need an upgrade, are corrupt or were
not closed cleanly..