Remove more references to GAE (#2894)

These are old/pointless now that we've migrated to GKE. Note that this
doesn't update anything in the docs/ folder, as that's a much larger
project that should be done on its own.

core/src/test/resources/google/registry/reporting/icann/attempted_adds_test.sql

@@ -19,7 +19,7 @@
   -- monthly GKE logs, searching for all create commands and associating
   -- them with their corresponding registrars.
 
-  -- Example log generated by FlowReporter in App Engine and GKE logs:
+  -- Example log generated by FlowReporter in GKE logs:
   --google.registry.flows.FlowReporter
   -- recordToLogs: FLOW-LOG-SIGNATURE-METADATA:
   --{"serverTrid":"oNwL2J2eRya7bh7c9oHIzg==-2360a","clientId":"ipmirror"

core/src/test/resources/google/registry/testing/logging.properties

@@ -3,6 +3,5 @@ handlers = java.util.logging.ConsoleHandler
 
 google.registry.level = FINE
 
-com.google.appengine.api.taskqueue.dev.level = WARNING
 com.google.apphosting.utils.config.level = WARNING
 org.quartz.level = WARNING