Remove icon from reference link as it is broken in core again

[uhafner]

UI visualization of the link is broken again in Jenkins core: JENKINS-72491. So it makes sense to remove the status icon and only show the raw link. When a fix for jenkinsci/jenkins#8705 is available, we can revert that change.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 82.41%. Comparing base (cb0172f) to head (6a1cbad).

❗ Current head 6a1cbad differs from pull request most recent head 1591ab4. Consider uploading reports for the commit 1591ab4 to get more accurate results

Files	Patch %	Lines
...kins/plugins/analysis/core/model/SummaryModel.java	0.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1697      +/-   ##
============================================
- Coverage     82.54%   82.41%   -0.13%     
+ Complexity     1348     1346       -2     
============================================
  Files           248      248              
  Lines          5202     5204       +2     
  Branches        400      400              
============================================
- Hits           4294     4289       -5     
- Misses          801      807       +6     
- Partials        107      108       +1     

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