Remove duplicate disa line in service_auditd_enabled

Author: redhatrises

linux_os/guide/system/auditing/service_auditd_enabled/rule.yml

@@ -33,8 +33,7 @@ references:
     stigid@ol7: OL07-00-030000
     stigid@rhel6: RHEL-06-000145
     srg@rhel6: SRG-OS-000032,SRG-OS-000037,SRG-OS-000255
-    disa@rhel6: CCI-000067,CCI-001115,CCI-001190,CCI-000120,CCI-001263,CCI-000130,CCI-001312,CCI-001353,CCI-001454,CCI-001462,CCI-001487,CCI-000157,CCI-000158,CCI-0001589,CCI-000172,CCI-000347,CCI-000831,CCI-000880
-    disa@rhel6: CCI-000067,CCI-001115,CCI-001190,CCI-000120,CCI-001263,CCI-000130,CCI-0001312,CCI-001353,CCI-0001454,CCI-001462,CCI-001487,CCI-000157,CCI-000158,CCI-001589,CCI-000172,CCI-000347,CCI-000831,CCI-000880
+    disa@rhel6: CCI-000067,CCI-001115,CCI-001190,CCI-000120,CCI-001263,CCI-000130,CCI-001312,CCI-001353,CCI-001454,CCI-001462,CCI-001487,CCI-000157,CCI-000158,CCI-001589,CCI-000172,CCI-000347,CCI-000831,CCI-000880
     cis@rhel8: 4.1.1.2
     cjis: 5.4.1.1
     cui: 3.3.1,3.3.2,3.3.6