Remove experimental spawn feature

[Cisphyx]

No description provided.

[codecov]

Codecov Report

Merging #2068 (a5e28a4) into master (8a5f8d2) will decrease coverage by 0.17%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2068      +/-   ##
==========================================
- Coverage   96.90%   96.73%   -0.18%     
==========================================
  Files         150      149       -1     
  Lines       29874    29478     -396     
==========================================
- Hits        28949    28515     -434     
- Misses        925      963      +38     

Flag	Coverage Δ
linux	96.73% <ø> (-0.18%)	⬇️
linux_replay	?

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Impacted Files	Coverage Δ
synapse/cmds/cortex.py	98.60% <ø> (-0.01%)	⬇️
synapse/cortex.py	95.87% <ø> (-0.86%)	⬇️
synapse/lib/layer.py	98.06% <ø> (-0.13%)	⬇️
synapse/lib/link.py	98.03% <ø> (-0.14%)	⬇️
synapse/lib/storm.py	98.11% <ø> (ø)
synapse/lib/view.py	94.17% <ø> (-0.73%)	⬇️
synapse/tests/utils.py	93.68% <0.00%> (-2.16%)	⬇️
synapse/daemon.py	89.04% <0.00%> (-1.41%)	⬇️
synapse/lib/hiveauth.py	96.06% <0.00%> (-0.75%)	⬇️
... and 7 more

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