bug 390845 - integrate talos with new pageloader. Bustage fix, missed change

to sample.config which breaks things.  p=anodelman r=anodelman

testing/performance/talos/sample.config

@@ -28,9 +28,6 @@ preferences :
   security.enable_java : false
   extensions.checkCompatibility : false
   extensions.update.notifyUser: false
-  capability.principal.codebase.p0.granted : UniversalPreferencesWrite UniversalXPConnect UniversalPreferencesRead
-  capability.principal.codebase.p0.id : file://
-  capability.principal.codebase.p1.granted : UniversalXPConnect
 
 # Extensions to install in test (use "extensions: {}" for none)
 # Need quotes around guid because of curly braces