update(userspace/engine): remove warnings for missing exceptions

We want users to continue using rules without having to use exceptions.
Exceptions are an additional feature for more advanced use-cases, having
a warning in there will mean that everyone now adds an empty exception
to avoid the warning.

Co-Authored-By: Leonardo Grasso <me@leonardograsso.com>
Signed-off-by: Lorenzo Fontana <lo@linux.com>

userspace/engine/lua/rule_loader.lua

@@ -522,10 +522,8 @@ function load_rules_doc(rules_mgr, doc, load_state)
 	    v['source'] = "syscall"
 	 end
 
-	 -- Add an empty exceptions property to the rule if not
-	 -- defined, but add a warning about defining one
+	 -- Add an empty exceptions property to the rule if not defined
 	 if v['exceptions'] == nil then
-	    warnings[#warnings + 1] = "Rule "..v['rule']..": consider adding an exceptions property to define supported exceptions fields"
 	    v['exceptions'] = {}
 	 end