Remove unused validate_postgresql_connection.sh script

This script has been unused since postgresql::validate_db_connection was
dropped. It now ensures the file is absent.

Fixes: 9b47b34 ("Delete deprecated validate_db_connection() defined resource")

Author: ekohl

files/validate_postgresql_connection.sh

@@ -26,10 +26,6 @@
   }
 
   file { $validcon_script_path:
-    ensure  => $file_ensure,
-    content => file('postgresql/validate_postgresql_connection.sh'),
-    owner   => 0,
-    group   => 0,
-    mode    => '0755',
+    ensure => absent,
   }
 }