fix: revert adding typing to DNSRecord.suppressed_by

[bdraco]

fixes #1207

This causes a cython compile crash

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: -0.33% ⚠️

Comparison is base (5f14b6d) 99.78% compared to head (10f847f) 99.45%.
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1210      +/-   ##
==========================================
- Coverage   99.78%   99.45%   -0.33%     
==========================================
  Files          22       22              
  Lines        2749     2749              
  Branches      477      477              
==========================================
- Hits         2743     2734       -9     
- Misses          3        8       +5     
- Partials        3        7       +4     

Files Changed	Coverage Δ
src/zeroconf/__init__.py	100.00% <100.00%> (ø)
src/zeroconf/_dns.py	100.00% <100.00%> (ø)

... and 4 files with indirect coverage changes

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