Remove copied code in zipkin receiver, use the source

[bogdandrutu]

The problem mentioned in the comment was with the thrift version, now fixed.

Signed-off-by: Bogdan Drutu bogdandrutu@gmail.com

[codecov]

Codecov Report

Merging #2484 (bbb51b0) into main (5cc0707) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #2484      +/-   ##
==========================================
+ Coverage   91.76%   91.78%   +0.01%     
==========================================
  Files         266      266              
  Lines       15112    15100      -12     
==========================================
- Hits        13867    13859       -8     
+ Misses        867      865       -2     
+ Partials      378      376       -2     

Impacted Files	Coverage Δ
receiver/zipkinreceiver/trace_receiver.go	92.30% <100.00%> (+2.65%)	⬆️

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[tigrannajaryan]

Please don't forget to include the description you put in the PR in the commit message too.