remove todo for logging dropped attributes

[brettmc]

this is already implemented for logs and traces as required by spec

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.65%. Comparing base (7eb3abb) to head (8ca21af).
Report is 2 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #1485      +/-   ##
============================================
- Coverage     70.71%   70.65%   -0.06%     
  Complexity     2761     2761              
============================================
  Files           408      408              
  Lines          8341     8341              
============================================
- Hits           5898     5893       -5     
- Misses         2443     2448       +5     

Flag	Coverage Δ
8.1	70.35% <ø> (-0.09%)	⬇️
8.2	70.59% <ø> (+0.02%)	⬆️
8.3	70.56% <ø> (-0.08%)	⬇️
8.4	70.60% <ø> (+0.02%)	⬆️
8.5	70.59% <ø> (-0.08%)	⬇️

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Files with missing lines	Coverage Δ
src/SDK/Common/Attribute/AttributesBuilder.php	80.95% <ø> (ø)

... and 2 files with indirect coverage changes

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