Delete disabled assertion and its disabled test

[JensAyton]

No description provided.

[codecov]

Codecov Report

Merging #172 (1a1d015) into master (b06ed67) will increase coverage by 0.52%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #172      +/-   ##
==========================================
+ Coverage   95.03%   95.55%   +0.52%     
==========================================
  Files          43       43              
  Lines        1470     1462       -8     
==========================================
  Hits         1397     1397              
+ Misses         73       65       -8     

Flag	Coverage Δ
ios	95.55% <ø> (+0.52%)	⬆️
macspm	95.51% <ø> (+0.52%)	⬆️

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Impacted Files	Coverage Δ
MobiusExtras/Source/ConnectableClass.swift	91.11% <ø> (+13.75%)	⬆️

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