Remove unused try block in UT

[zhongjiajie]

closes #6181

Purpose of the pull request

closes #6181 and remove unused code

[codecov-commenter]

Codecov Report

Merging #6182 (a256487) into dev (6dedafb) will decrease coverage by 0.00%.
The diff coverage is n/a.

❗ Current head a256487 differs from pull request most recent head c2304fb. Consider uploading reports for the commit c2304fb to get more accurate results

@@             Coverage Diff              @@
##                dev    #6182      +/-   ##
============================================
- Coverage     39.08%   39.07%   -0.01%     
+ Complexity     3251     3249       -2     
============================================
  Files           637      637              
  Lines         25281    25281              
  Branches       2744     2744              
============================================
- Hits           9880     9878       -2     
  Misses        14520    14520              
- Partials        881      883       +2     

Impacted Files	Coverage Δ
...er/master/dispatch/host/assign/RandomSelector.java	77.77% <0.00%> (-5.56%)	⬇️
...dolphinscheduler/remote/future/ResponseFuture.java	81.35% <0.00%> (-1.70%)	⬇️

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[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[CalvinKirs]

This UT needs to be modified

[zhongjiajie]

Got it, mean that we should not remove but make it work again. I would try to correct it

[davidzollo]

+1
good job

[lenboo]

+1