Fix examples

docs/examples/config.hcl

@@ -28,9 +28,6 @@ rule {
     label_keys   = true
     label_values = true
   }
-
-  # Check if all queries use correct vector matching rules
-  vector_matching {}
 }
 
 rule {
@@ -96,10 +93,6 @@ rule {
     keep     = ["job"]
   }
 
-  # Enable series check that will warn if alert rules are using time series
-  # not present in any of configured Prometheus servers.
-  series {}
-
   # Enable cost checks that will print the number of returned time series and try
   # to estimate total memory usage assuming that each series require 4KB of memory.
   cost {

docs/examples/simple.hcl

@@ -1,13 +1,7 @@
-# This is a simplified config that only uses "series" check to report any
-# alert that is using time series not found in Prometheus server.
+# This is a simplified config that only uses a single Prometheus
+# server for all checks.
 
 prometheus "prod" {
   uri     = "https://prod.example.com"
   timeout = "1m"
 }
-
-rule {
-  series {
-    severity = "bug"
-  }
-}