Error Summary
-------------
Disk Requirements:
 At least 3MB more space needed on the /boot filesystem.

[root@sd-xxxx pjrfigueiredo]# df -H /boot
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda1       199M  156M   29M  85% /boot
[root@sd-xxxx pjrfigueiredo]# rpm -qa | grep kernel
kernel-tools-libs-3.10.0-514.16.1.el7.x86_64
abrt-addon-kerneloops-2.1.11-45.el7.centos.x86_64
kernel-tools-3.10.0-514.16.1.el7.x86_64
kernel-3.10.0-514.10.2.el7.x86_64
kernel-3.10.0-514.16.1.el7.x86_64
[root@sd-xxxx pjrfigueiredo]# rpm -e kernel-3.10.0-514.10.2.el7.x86_64
[root@sd-xxxx pjrfigueiredo]# df -H /boot
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda1       199M  111M   74M  61% /boot

or…

sudo yum remove `rpm -q kernel | grep -v 'uname -r'`