Remove references to removed regression directory.

tools/Jamfile.v2

@@ -17,15 +17,10 @@ project
     usage-requirements <implicit-dependency>/boost//headers 
     ;
 
-use-project /boost/regression : regression/build ;
-
 TOOLS =
     bcp//bcp
     inspect/build//inspect
     quickbook//quickbook
-    /boost/regression//compiler_status
-    /boost/regression//library_status
-    /boost/regression//process_jam_log
     wave/build//wave
     ;