remove group constrainte, it's now a normal group

tests/dictionaries_old/80frozenifin_unknown/00-base.xml

@@ -0,0 +1,26 @@
+<?xml version='1.0' encoding='UTF-8'?>
+<rougail version="0.9">
+  <variables>
+    <family name="general" mode="expert">
+      <variable name="mode_conteneur_actif" type="string" description="No change">
+        <value>non</value>
+      </variable>
+    </family>
+    <family name="enumfam" mode="expert">
+      <variable name="enumvar" type="number" description="enumvar" help="bla bla bla"/>
+      <variable name="test_variable" type="number" description="test variable"/>
+    </family>
+  </variables>
+  <constraints>
+    <check name="valid_enum">
+      <param>1</param>
+      <param>2</param>
+      <param>3</param>
+      <target>enumvar</target>
+    </check>
+    <condition name="hidden_if_in" source="condition">
+      <param>4</param>
+      <target type="variable">test_variable</target>
+    </condition>
+  </constraints>
+</rougail>