util/s3: remove extra println

[algolucky]

Summary

• removes the extra println from util/s3 since older update.sh scripts use an exact line number to get the version. this was introduced in util/s3: enable more credential providers #4929

[codecov]

Codecov Report

Merging #5024 (3edfc1e) into master (eddf773) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #5024      +/-   ##
==========================================
- Coverage   53.63%   53.63%   -0.01%     
==========================================
  Files         432      432              
  Lines       54057    54055       -2     
==========================================
- Hits        28996    28991       -5     
- Misses      22812    22818       +6     
+ Partials     2249     2246       -3     

Impacted Files	Coverage Δ
util/s3/s3Helper.go	45.37% <ø> (-0.91%)	⬇️
ledger/blockqueue.go	85.63% <0.00%> (-2.88%)	⬇️
crypto/merkletrie/trie.go	66.42% <0.00%> (-2.19%)	⬇️
crypto/merkletrie/node.go	91.62% <0.00%> (-1.87%)	⬇️
cmd/tealdbg/debugger.go	72.69% <0.00%> (-0.81%)	⬇️
catchup/service.go	69.08% <0.00%> (-0.73%)	⬇️
ledger/acctupdates.go	69.24% <0.00%> (-0.25%)	⬇️
ledger/testing/randomAccounts.go	56.26% <0.00%> (ø)
network/wsNetwork.go	64.92% <0.00%> (+0.17%)	⬆️
catchup/peerSelector.go	100.00% <0.00%> (+1.04%)	⬆️
... and 3 more

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[onetechnical]

I believe updated versions do a tail instead, so curious if this is still necessary. Doesn't hurt anything, I don't think.