Removed EOL CentOS

@ejarvi please review

Author: jackrichins

articles/security/azure-security-disk-encryption-faq.md

@@ -55,11 +55,6 @@ Linux server distributions that are not endorsed by Azure do not support Azure D
 | CentOS | 7.3 | OS and data disk |
 | CentOS | 7.2n | OS and data disk |
 | CentOS | 6.8 | Data disk |
-| CentOS | 7.1 | Data disk |
-| CentOS | 7.0 | Data disk |
-| CentOS | 6.7 | Data disk |
-| CentOS | 6.6 | Data disk |
-| CentOS | 6.5 | Data disk |
 | openSUSE | 42.3 | Data disk |
 | SLES | 12-SP4 | Data disk |
 | SLES | 12-SP3 | Data disk |