apt remove readline

You might want to run 'apt --fix-broken install' to correct these.
The following packages have unmet dependencies:
 abiword : Depends: libreadline7 (>= 6.0) but it is not going to be installed
           Recommends: abiword-plugin-grammar but it is not going to be installed
 bc : Depends: libreadline7 (>= 6.0) but it is not going to be installed
 bluez : Depends: libreadline7 (>= 6.0) but it is not going to be installed
 ftp : Depends: libreadline7 (>= 6.0) but it is not going to be installed
 gdb : Depends: libreadline7 (>= 6.0) but it is not going to be installed
 gpg : Depends: libreadline7 (>= 6.0) but it is not going to be installed
 gpgconf : Depends: libreadline7 (>= 6.0) but it is not going to be installed
 gpgsm : Depends: libreadline7 (>= 6.0) but it is not going to be installed
 libfluidsynth1 : Depends: libreadline7 (>= 6.0) but it is not going to be installed
 liboctave4 : Depends: libreadline7 (>= 6.0) but it is not going to be installed
 libpython2.7-stdlib : Depends: libreadline7 (>= 7.0~beta) but it is not going to be installed
 libpython3.6-stdlib : Depends: libreadline7 (>= 7.0~beta) but it is not going to be installed
 libreadline-dev:i386 : Depends: libreadline7:i386 (= 7.0-3) but 7.0-0ubuntu2 is to be installed
 network-manager : Depends: libreadline7 (>= 6.0) but it is not going to be installed
                   Recommends: dnsmasq-base
                   Recommends: network-manager-pptp but it is not going to be installed
                   Recommends: iputils-arping but it is not going to be installed
 parted : Depends: libreadline7 (>= 6.0) but it is not going to be installed
 wpasupplicant : Depends: libreadline7 (>= 6.0) but it is not going to be installed
E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution).