Remove unused fields

[ssoloff]

I believe all of these fields are no longer used after #2793.

[codecov-io]

Codecov Report

Merging #2826 into master will decrease coverage by <.01%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #2826      +/-   ##
============================================
- Coverage     20.13%   20.13%   -0.01%     
+ Complexity     5747     5745       -2     
============================================
  Files           815      815              
  Lines         73269    73258      -11     
  Branches      12136    12136              
============================================
- Hits          14752    14748       -4     
+ Misses        56426    56417       -9     
- Partials       2091     2093       +2

Impacted Files	Coverage Δ	Complexity Δ
...ngine/lobby/server/db/MutedUsernameController.java	0% <ø> (ø)	0 <0> (ø)	⬇️
...a/games/strategy/triplea/ui/AbstractMovePanel.java	0% <ø> (-0.79%)	0 <0> (-1)
...mes/strategy/engine/data/CompositeRouteFinder.java	0% <ø> (ø)	0 <0> (ø)	⬇️
...gy/engine/lobby/server/db/BannedMacController.java	0% <ø> (ø)	0 <0> (ø)	⬇️
...tegy/engine/delegate/DelegateExecutionManager.java	0% <ø> (ø)	0 <0> (ø)	⬇️
...egy/engine/lobby/server/db/MutedMacController.java	0% <ø> (ø)	0 <0> (ø)	⬇️
...gine/lobby/server/db/BannedUsernameController.java	0% <ø> (ø)	0 <0> (ø)	⬇️
...gine/framework/startup/launcher/LocalLauncher.java	0% <ø> (ø)	0 <0> (ø)	⬇️
...ine/framework/startup/launcher/ServerLauncher.java	0% <ø> (ø)	0 <0> (ø)	⬇️
...in/java/games/strategy/triplea/image/ImageRef.java	0% <ø> (ø)	0 <0> (ø)	⬇️
... and 2 more

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