Merge pull request #1919 from etshy/fix-xsd-1.2

Replace the deprecated comment

Author: alcaeus

doctrine-mongo-mapping.xsd

@@ -158,7 +158,8 @@
     <xs:attribute name="target-document" type="xs:string" />
     <xs:attribute name="field" type="xs:NMTOKEN" use="required" />
     <xs:attribute name="fieldName" type="xs:NMTOKEN" />
-    <xs:attribute name="simple" type="xs:boolean" /><!-- deprecated -->
+    <!-- deprecated -->
+    <xs:attribute name="simple" type="xs:boolean" />
     <xs:attribute name="store-as" type="odm:reference-store-as" default="dbRefWithDb" />
     <xs:attribute name="inversed-by" type="xs:NMTOKEN" />
     <xs:attribute name="mapped-by" type="xs:NMTOKEN" />
@@ -183,7 +184,8 @@
     <xs:attribute name="collection-class" type="xs:string" />
     <xs:attribute name="field" type="xs:NMTOKEN" use="required" />
     <xs:attribute name="fieldName" type="xs:NMTOKEN" />
-    <xs:attribute name="simple" type="xs:boolean" /><!-- deprecated -->
+    <!-- deprecated -->
+    <xs:attribute name="simple" type="xs:boolean" />
     <xs:attribute name="store-as" type="odm:reference-store-as" default="dbRefWithDb" />
     <xs:attribute name="strategy" type="xs:NMTOKEN" default="pushAll" />
     <xs:attribute name="inversed-by" type="xs:NMTOKEN" />