Fix return type docs for unserialize() methods

Closes #1388

reference/mongodb/bson/binary/unserialize.xml

@@ -34,7 +34,7 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-   Returns the unserialized <classname>MongoDB\BSON\Binary</classname>.
+   &return.void;
   </para>
  </refsect1>
 

reference/mongodb/bson/dbpointer/unserialize.xml

@@ -34,7 +34,7 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-   Returns the unserialized <classname>MongoDB\BSON\DBPointer</classname>.
+   &return.void;
   </para>
  </refsect1>
 

reference/mongodb/bson/decimal128/unserialize.xml

@@ -34,7 +34,7 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-   Returns the unserialized <classname>MongoDB\BSON\Decimal128</classname>.
+   &return.void;
   </para>
  </refsect1>
 

reference/mongodb/bson/int64/unserialize.xml

@@ -34,7 +34,7 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-   Returns the unserialized <classname>MongoDB\BSON\Int64</classname>.
+   &return.void;
   </para>
  </refsect1>
 

reference/mongodb/bson/javascript/unserialize.xml

@@ -34,7 +34,7 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-   Returns the unserialized <classname>MongoDB\BSON\Javascript</classname>.
+   &return.void;
   </para>
  </refsect1>
 

reference/mongodb/bson/maxkey/unserialize.xml

@@ -34,7 +34,7 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-   Returns the unserialized <classname>MongoDB\BSON\MaxKey</classname>.
+   &return.void;
   </para>
  </refsect1>
 

reference/mongodb/bson/minkey/unserialize.xml

@@ -34,7 +34,7 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-   Returns the unserialized <classname>MongoDB\BSON\MinKey</classname>.
+   &return.void;
   </para>
  </refsect1>
 

reference/mongodb/bson/objectid/unserialize.xml

@@ -34,7 +34,7 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-   Returns the unserialized <classname>MongoDB\BSON\ObjectId</classname>.
+   &return.void;
   </para>
  </refsect1>
 

reference/mongodb/bson/regex/unserialize.xml

@@ -34,7 +34,7 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-   Returns the unserialized <classname>MongoDB\BSON\Regex</classname>.
+   &return.void;
   </para>
  </refsect1>
 

reference/mongodb/bson/symbol/unserialize.xml

@@ -34,7 +34,7 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-   Returns the unserialized <classname>MongoDB\BSON\Symbol</classname>.
+   &return.void;
   </para>
  </refsect1>
 

reference/mongodb/bson/timestamp/unserialize.xml

@@ -34,7 +34,7 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-   Returns the unserialized <classname>MongoDB\BSON\Timestamp</classname>.
+   &return.void;
   </para>
  </refsect1>
 

reference/mongodb/bson/undefined/unserialize.xml

@@ -34,7 +34,7 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-   Returns the unserialized <classname>MongoDB\BSON\Undefined</classname>.
+   &return.void;
   </para>
  </refsect1>
 

reference/mongodb/bson/utcdatetime/unserialize.xml

@@ -34,7 +34,7 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-   Returns the unserialized <classname>MongoDB\BSON\UTCDateTime</classname>.
+   &return.void;
   </para>
  </refsect1>
 

reference/mongodb/mongodb/driver/cursorid/unserialize.xml

@@ -34,7 +34,7 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-   Returns the unserialized <classname>MongoDB\Driver\CursorId</classname>.
+   &return.void;
   </para>
  </refsect1>
 

reference/mongodb/mongodb/driver/readconcern/unserialize.xml

@@ -34,7 +34,7 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-   Returns the unserialized <classname>MongoDB\Driver\ReadConcern</classname>.
+   &return.void;
   </para>
  </refsect1>
 

reference/mongodb/mongodb/driver/readpreference/unserialize.xml

@@ -34,7 +34,7 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-   Returns the unserialized <classname>MongoDB\Driver\ReadPreference</classname>.
+   &return.void;
   </para>
  </refsect1>
 

reference/mongodb/mongodb/driver/serverapi/unserialize.xml

@@ -34,7 +34,7 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-   Returns the unserialized <classname>MongoDB\Driver\ServerApi</classname>.
+   &return.void;
   </para>
  </refsect1>
 

reference/mongodb/mongodb/driver/writeconcern/unserialize.xml

@@ -34,7 +34,7 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-   Returns the unserialized <classname>MongoDB\Driver\WriteConcern</classname>.
+   &return.void;
   </para>
  </refsect1>