8238241: Clean up problem list for JFR tests

Reviewed-by: mgronlun, mseledtsov
diff --git a/test/jdk/ProblemList.txt b/test/jdk/ProblemList.txt
index 05294ca..3021ceb 100644
--- a/test/jdk/ProblemList.txt
+++ b/test/jdk/ProblemList.txt
@@ -934,8 +934,6 @@
 
 jdk/jfr/event/runtime/TestNetworkUtilizationEvent.java          8228990,8229370    generic-all
 jdk/jfr/event/compiler/TestCodeSweeper.java                     8225209    generic-all
-jdk/jfr/api/consumer/recordingstream/TestSetStartTime.java      8233217    generic-all
-jdk/jfr/jmx/security/TestEnoughPermission.java                  8235946    generic-all
 
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