Remove outdated garbage collector information (#958)

Fixes #957

(cherry picked from commit ad8f778)

docs/modules/troubleshoot/pages/remedies-for-alerts.adoc

@@ -39,17 +39,6 @@ You can also enable GC logging settings as shown below in your JVM options confi
 -XX:+PrintGCApplicationStoppedTime
 ----
 
-Also, instead of the default Java 8 ParallelGC, it is recommended to switch to CMS GC,
-since it ensures a good tradeoff between the operations throughput and GC pauses. For this,
-add the following lines to your JVM options configuration file:
-
-[source,plain]
-----
--XX:CMSInitiatingOccupancyFraction=65
--XX:+UseParNewGC
--XX:+UseConcMarkSweepGC
-----
-
 You can use the following parameter to specify the location for the GC log file:
 
 [source,plain]