Remove duplicit 13-el7 tag

The tag was in the image stream twice

Author: hhorak

imagestreams/postgresql-centos.json

@@ -62,24 +62,6 @@
           "type": "Local"
         }
       },
-      {
-        "name": "13-el7",
-        "annotations": {
-          "openshift.io/display-name": "PostgreSQL 13 (CentOS 7)",
-          "openshift.io/provider-display-name": "Red Hat, Inc.",
-          "description": "Provides a PostgreSQL 13 database on CentOS 7. For more information about using this database image, including OpenShift considerations, see https://github.com/sclorg/postgresql-container/blob/master/README.md.",
-          "iconClass": "icon-postgresql",
-          "tags": "database,postgresql",
-          "version": "13"
-        },
-        "from": {
-          "kind": "DockerImage",
-          "name": "quay.io/centos7/postgresql-13-centos7:latest"
-        },
-        "referencePolicy": {
-          "type": "Local"
-        }
-      },
       {
         "name": "12-el7",
         "annotations": {

imagestreams/postgresql-rhel.json

@@ -98,24 +98,6 @@
           "type": "Local"
         }
       },
-      {
-        "name": "13-el7",
-        "annotations": {
-          "openshift.io/display-name": "PostgreSQL 13 (RHEL 7)",
-          "openshift.io/provider-display-name": "Red Hat, Inc.",
-          "description": "Provides a PostgreSQL 13 database on RHEL 7. For more information about using this database image, including OpenShift considerations, see https://github.com/sclorg/postgresql-container/blob/master/README.md.",
-          "iconClass": "icon-postgresql",
-          "tags": "database,postgresql",
-          "version": "13"
-        },
-        "from": {
-          "kind": "DockerImage",
-          "name": "registry.redhat.io/rhscl/postgresql-13-rhel7:latest"
-        },
-        "referencePolicy": {
-          "type": "Local"
-        }
-      },
       {
         "name": "12-el7",
         "annotations": {