Remove unused <st:once> tag

[basil]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.65%. Comparing base (68e4d40) to head (2a120e0).
Report is 8 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #442      +/-   ##
============================================
- Coverage     72.04%   71.65%   -0.40%     
  Complexity      221      221              
============================================
  Files            17       17              
  Lines          1023     1030       +7     
  Branches        144      146       +2     
============================================
+ Hits            737      738       +1     
- Misses          198      203       +5     
- Partials         88       89       +1     

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[jtnord]

thanks