Revert "Fixed DB lock contention during vulnerability cron's software…

[getvictor]

… cleanup that caused failures under load (#41375) (#41380)"

This reverts commit ed73783.

Reverting since this causes infinite loop and we don't have time to verify the follow up fix for that.

[codecov]

Codecov Report

❌ Patch coverage is 83.33333% with 2 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (rc-minor-fleet-v4.82.0@bdfebbc). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
server/datastore/mysql/software.go	83.33%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@                    Coverage Diff                    @@
##             rc-minor-fleet-v4.82.0   #41460   +/-   ##
=========================================================
  Coverage                          ?   66.13%           
=========================================================
  Files                             ?     1438           
  Lines                             ?   163219           
  Branches                          ?        0           
=========================================================
  Hits                              ?   107937           
  Misses                            ?    44355           
  Partials                          ?    10927           

Flag	Coverage Δ
backend	66.13% <83.33%> (?)

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