Remove JsonProcessingException stub that won't be needed for com.datadoghq:jmxfetch:0.49.7+

Author: ygree

dd-java-agent/agent-jmxfetch/src/main/java/com/fasterxml/jackson/core/JsonProcessingException.java

@@ -39,7 +39,6 @@ public String[] helperClassNames() {
       packageName + ".Target_datadog_jctools_counters_FixedSizeStripedLongCounterFields",
       packageName + ".Target_datadog_jctools_util_UnsafeRefArrayAccess",
       packageName + ".Target_org_datadog_jmxfetch_App",
-      "com.fasterxml.jackson.core.JsonProcessingException", // referenced by jmxfetch.App
       packageName + ".Target_org_datadog_jmxfetch_Status",
       packageName + ".Target_org_datadog_jmxfetch_reporter_JsonReporter",
     };