remove a debug print statement

[charles-cooper]

Added by accident in cea5dd8, sorry

[codecov-commenter]

Codecov Report

Merging #2409 (826ff12) into master (4ebf54d) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2409      +/-   ##
==========================================
- Coverage   85.48%   85.47%   -0.02%     
==========================================
  Files          91       91              
  Lines        9035     9034       -1     
  Branches     2151     2151              
==========================================
- Hits         7724     7722       -2     
- Misses        805      806       +1     
  Partials      506      506              

Impacted Files	Coverage Δ
vyper/old_codegen/events.py	95.00% <ø> (-0.13%)	⬇️
vyper/old_codegen/types/types.py	81.37% <0.00%> (-0.50%)	⬇️

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