hosts/monitoring-3: Remove some ping targets

hosts/monitoring-3/prometheus.nix

@@ -230,15 +230,6 @@ in {
               "achtbaan.nikhef.nl"
               "www.fem.tu-ilmenau.de"
               "www.heise.de"
-              "pe10-fd2.nodes.nethinks.com"
-              "pe20-fd2.nodes.nethinks.com"
-              "pe10-pet1.nodes.nethinks.com"
-              "pe20-pet1.nodes.nethinks.com"
-              "pe10-ffm1.nodes.nethinks.com"
-              "ie10-ffm2.nodes.nethinks.com"
-              "pe10-ffm2.nodes.nethinks.com"
-              "ie10-due1.nodes.nethinks.com"
-              "pe10-due1.nodes.nethinks.com"
               "matrix.bau-ha.us"
               "dyon.net.entr0py.de"
               "matrix.entr0py.de"
@@ -358,20 +349,6 @@ in {
           relabelAddressToInstance
         ];
       }
-      {
-        job_name = "xmpp-alerts";
-        scrape_interval = "20s";
-        static_configs = [
-          {
-            targets = [
-              "monitoring-3.mon.clerie.de:9199"
-            ];
-          }
-        ];
-        relabel_configs = [
-          relabelAddressToInstance
-        ];
-      }
       {
         job_name = "hydra";
         scrape_interval = "20s";