Description of problem:
SELinux is preventing accounts-daemon from 'unlink' accesses on the file /var/lib/AccountsService/users/gdm.

*****  Plugin restorecon (99.5 confidence) suggests   ************************

If you want to fix the label. 
/var/lib/AccountsService/users/gdm default label should be accountsd_var_lib_t.
Then you can run restorecon. The access attempt may have been stopped due to insufficient permissions to access a parent directory in which case try to change the following command accordingly.
Do
# /sbin/restorecon -v /var/lib/AccountsService/users/gdm

*****  Plugin catchall (1.49 confidence) suggests   **************************

If you believe that accounts-daemon should be allowed unlink access on the gdm file by default.
Then you should report this as a bug.
You can generate a local policy module to allow this access.
Do
allow this access for now by executing:
# ausearch -c 'accounts-daemon' --raw | audit2allow -M my-accountsdaemon
# semodule -X 300 -i my-accountsdaemon.pp

Additional Information:
Source Context                system_u:system_r:accountsd_t:s0
Target Context                system_u:object_r:unlabeled_t:s0
Target Objects                /var/lib/AccountsService/users/gdm [ file ]
Source                        accounts-daemon
Source Path                   accounts-daemon
Port                          <Unknown>
Host                          (removed)
Source RPM Packages           
Target RPM Packages           
Policy RPM                    selinux-policy-3.14.3-15.fc30.noarch
Selinux Enabled               True
Policy Type                   targeted
Enforcing Mode                Enforcing
Host Name                     (removed)
Platform                      Linux (removed) 4.20.0-0.rc7.git1.1.fc30.x86_64 #1
                              SMP Tue Dec 18 22:52:01 UTC 2018 x86_64 x86_64
Alert Count                   2
First Seen                    2018-12-22 22:39:11 +05
Last Seen                     2018-12-22 22:39:11 +05
Local ID                      6e89ba72-3bb7-49e0-b206-9aa2b3eda899

Raw Audit Messages
type=AVC msg=audit(1545500351.849:198): avc:  denied  { unlink } for  pid=1056 comm="accounts-daemon" name="gdm" dev="nvme0n1p2" ino=2883642 scontext=system_u:system_r:accountsd_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=file permissive=0


Hash: accounts-daemon,accountsd_t,unlabeled_t,file,unlink

Version-Release number of selected component:
selinux-policy-3.14.3-15.fc30.noarch

Additional info:
component:      selinux-policy
reporter:       libreport-2.9.7
hashmarkername: setroubleshoot
kernel:         4.20.0-0.rc7.git1.1.fc30.x86_64
type:           libreport

Potential duplicate: bug 1391416