fix: Removes macro that references missing function

[isaacsanders]

No description provided.

[linux-foundation-easycla]

The committers are authorized under a signed CLA.

• ✅ Isaac Sanders (ecef326)

[tsloughter]

Woops, thanks! :) Yea, links is only able to be set at start of a span but that wasn't always the case.

[codecov]

Codecov Report

Merging #309 (ecef326) into main (b0f4c6b) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #309   +/-   ##
=======================================
  Coverage   37.90%   37.90%           
=======================================
  Files          49       49           
  Lines        3327     3327           
=======================================
  Hits         1261     1261           
  Misses       2066     2066           

Flag	Coverage Δ
api	65.14% <ø> (ø)
elixir	14.59% <ø> (ø)
erlang	37.91% <ø> (ø)
exporter	19.75% <ø> (ø)
sdk	75.82% <ø> (ø)

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[tsloughter]

@isaacsanders can you sign the CLA? I'll merge once you do.