remove ATN/RTT test configuration

the xml configuration files are obsolete as ATN and RTT were superseded by ART

Trigger/TrigValidation/TrigAnalysisTest/test/TrigAnalysisTest_AthAnalysisBaseTestConfiguration.xml

-<?xml version="1.0"?> 
-<!DOCTYPE unifiedTestConfiguration SYSTEM "http://www.hep.ucl.ac.uk/atlas/AtlasTesting/DTD/unifiedTestConfiguration.dtd"> 
-<!-- NB validate this file here before committing to svn:
- python /afs/cern.ch/user/r/rtt/public/xmlvalidate.py TrigAnalysisTest_AthAnalysisBaseTestConfiguration.xml
- -->
-<unifiedTestConfiguration>
-    
-	<atn>
-	   <TEST name="TriggersFired_atn" type="athena" suite="TriggerDecisionToolTest">
-	      <options_atn>TrigAnalysisTest/TriggersFiredTest_jobOptions.py</options_atn>
-	      <timelimit>30</timelimit>
-	      <author>Javier Montejo</author>
-	      <mailto>jmontejo@cern.ch</mailto>
-			 <package_atn>Trigger/TrigValidation/TrigAnalysisTest</package_atn>
-	      <expectations>
-	         <errorMessage>FAILURE </errorMessage>
-	         <returnValue>0</returnValue>
-	      </expectations>
-	   </TEST>
-
-
-	   <TEST name="Run1xAODValidation_atn" type="athena" suite="TriggerDecisionToolTest">
-	      <options_atn>TrigAnalysisTest/ValidateRun1BStoxAOD_jobOptions.py</options_atn>
-	      <timelimit>30</timelimit>
-	      <author>Oleg Kuprash</author>
-	      <mailto>oleg.kuprash@cern.ch</mailto>
-			 <package_atn>Trigger/TrigValidation/TrigAnalysisTest</package_atn>
-	      <expectations>
-	         <errorMessage>FAILURE </errorMessage>
-	         <returnValue>0</returnValue>
-	      </expectations>
-	   </TEST>
-	</atn>
-
-
-</unifiedTestConfiguration>