remove EOL OSes

Author: h-haaks

metadata.json

@@ -25,7 +25,6 @@
     {
       "operatingsystem": "Debian",
       "operatingsystemrelease": [
-        "10",
         "11"
       ]
     },
@@ -38,7 +37,6 @@
     {
       "operatingsystem": "RedHat",
       "operatingsystemrelease": [
-        "7",
         "8"
       ]
     },
@@ -54,26 +52,12 @@
         "8"
       ]
     },
-    {
-      "operatingsystem": "CentOS",
-      "operatingsystemrelease": [
-        "7",
-        "8"
-      ]
-    },
     {
       "operatingsystem": "SLES",
       "operatingsystemrelease": [
         "12",
         "15"
       ]
-    },
-    {
-      "operatingsystem": "Ubuntu",
-      "operatingsystemrelease": [
-        "18.04",
-        "20.04"
-      ]
     }
   ],
   "requirements": [