(MAINT) Remove RHEL 5 OS family support

Author: Ciaran McCrisken

metadata.json

@@ -17,7 +17,6 @@
     {
       "operatingsystem": "RedHat",
       "operatingsystemrelease": [
-        "5",
         "6",
         "7",
         "8"
@@ -26,7 +25,6 @@
     {
       "operatingsystem": "CentOS",
       "operatingsystemrelease": [
-        "5",
         "6",
         "7",
         "8"