GROOVY-11921: groovy-jmx: remove dead IIOP support, refresh docs

[paulk-asert]

No description provided.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 66.4910%. Comparing base (d37b245) to head (503ec07).
⚠️ Report is 11 commits behind head on master.

Additional details and impacted files

@@                Coverage Diff                 @@
##               master      #2460        +/-   ##
==================================================
+ Coverage     66.4893%   66.4910%   +0.0017%     
- Complexity      30270      30271         +1     
==================================================
  Files            1411       1411                
  Lines          118031     118031                
  Branches        20989      20989                
==================================================
+ Hits            78478      78480         +2     
+ Misses          33075      33073         -2     
  Partials         6478       6478                

Files with missing lines	Coverage Δ
...roovy/jmx/builder/JmxClientConnectorFactory.groovy	35.2941% <100.0000%> (ø)
...roovy/jmx/builder/JmxServerConnectorFactory.groovy	25.5814% <100.0000%> (ø)

... and 4 files with indirect coverage changes

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