Remove the sources if they are disabled

[houshengbo]

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[codecov[bot]]

Codecov Report

Merging #1175 (2ba5cc1) into main (290b9c7) will increase coverage by 0.16%. The diff coverage is 91.66%.

@@            Coverage Diff             @@
##             main    #1175      +/-   ##
==========================================
+ Coverage   79.06%   79.23%   +0.16%     
==========================================
  Files          35       35              
  Lines        1519     1541      +22     
==========================================
+ Hits         1201     1221      +20     
- Misses        232      233       +1     
- Partials       86       87       +1     

Impacted Files	Coverage Δ
pkg/reconciler/knativeeventing/source/source.go	94.73% <91.66%> (-1.16%)	:arrow_down:

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: houshengbo, maximilien

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