Removed people from the doap.rdf who have left the project with the graduation.
diff --git a/doap.rdf b/doap.rdf
index 68bd7cb..163d62d 100644
--- a/doap.rdf
+++ b/doap.rdf
@@ -64,13 +64,6 @@
     </developer>
     <developer>
       <foaf:Person>
-        <foaf:name>Evangelia Dendramis</foaf:name>
-        <foaf:nick>edendramis</foaf:nick>
-        <foaf:mbox rdf:resource="mailto:edendramis@apache.org"/>
-      </foaf:Person>
-    </developer>
-    <developer>
-      <foaf:Person>
         <foaf:name>Nan Lei</foaf:name>
         <foaf:nick>nanlei</foaf:nick>
         <foaf:mbox rdf:resource="mailto:nanlei@apache.org"/>
@@ -92,13 +85,6 @@
     </developer>
     <developer>
       <foaf:Person>
-        <foaf:name>Jean-Frederic Clere</foaf:name>
-        <foaf:nick>jfclere</foaf:nick>
-        <foaf:mbox rdf:resource="mailto:jfclere@apache.org"/>
-      </foaf:Person>
-    </developer>
-    <developer>
-      <foaf:Person>
         <foaf:name>David E. Jones</foaf:name>
         <foaf:nick>jonesde</foaf:nick>
         <foaf:mbox rdf:resource="mailto:jonesde@apache.org"/>
@@ -106,13 +92,6 @@
     </developer>
     <developer>
       <foaf:Person>
-        <foaf:name>Ralph Goers</foaf:name>
-        <foaf:nick>rgoers</foaf:nick>
-        <foaf:mbox rdf:resource="mailto:rgoers@apache.org"/>
-      </foaf:Person>
-    </developer>
-    <developer>
-      <foaf:Person>
         <foaf:name>Sergio Fernández</foaf:name>
         <foaf:nick>wikier</foaf:nick>
         <foaf:mbox rdf:resource="mailto:wikier@apache.org"/>