cleanup: remove obsolete mesos configuration

[dgrove-oss]

Remove bits of mesos code missed in #5133

[codecov-commenter]

Codecov Report

Merging #5144 (f3d380b) into master (4e25ada) will increase coverage by 30.06%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master    #5144       +/-   ##
===========================================
+ Coverage   43.94%   74.00%   +30.06%     
===========================================
  Files         231      224        -7     
  Lines       12806    12539      -267     
  Branches      503      497        -6     
===========================================
+ Hits         5627     9279     +3652     
+ Misses       7179     3260     -3919     

Impacted Files	Coverage Δ
...in/scala/org/apache/openwhisk/common/Logging.scala	77.07% <ø> (+4.60%)	⬆️
.../scala/org/apache/openwhisk/core/WhiskConfig.scala	95.62% <ø> (-0.03%)	⬇️
...whisk/connector/kafka/KafkaProducerConnector.scala	55.00% <0.00%> (-32.50%)	⬇️
...whisk/connector/kafka/KafkaConsumerConnector.scala	53.52% <0.00%> (-28.17%)	⬇️
...pache/openwhisk/core/invoker/InvokerReactive.scala	57.75% <0.00%> (-20.69%)	⬇️
.../scala/org/apache/openwhisk/utils/Exceptions.scala	20.00% <0.00%> (-20.00%)	⬇️
...a/org/apache/openwhisk/http/BasicHttpService.scala	79.36% <0.00%> (-11.12%)	⬇️
...pache/openwhisk/core/entity/ConcurrencyLimit.scala	88.23% <0.00%> (-5.89%)	⬇️
...pache/openwhisk/core/containerpool/Container.scala	85.05% <0.00%> (-5.75%)	⬇️
...sk/core/containerpool/docker/DockerContainer.scala	87.91% <0.00%> (-4.40%)	⬇️
... and 138 more

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