Revert "allow gcc-10.x build to fail"

This reverts commit 80336efb.
34 jobs for dont-allow-gcc10-failures in 125 minutes and 18 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  .Pre
passed #1061989
make-dist

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  Lal
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lal:conda:fftw

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lal:conda:mkl

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lal:deb

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lal:rpm

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  Lal Frame
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lalframe:conda

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passed #1061995
lalframe:deb

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lalframe:rpm

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  Lal Meta Io
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lalmetaio:conda

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lalmetaio:deb

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passed #1061997
lalmetaio:rpm

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  Lal Simulation
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lalsimulation:conda

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passed #1062001
lalsimulation:deb

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passed #1062000
lalsimulation:rpm

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  Lal Burst
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lalburst:conda

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passed #1062004
lalburst:deb

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lalburst:rpm

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  Lal Inspiral
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lalinspiral:conda

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passed #1062007
lalinspiral:deb

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passed #1062006
lalinspiral:rpm

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  Lal Pulsar
passed #1062011
lalpulsar:conda

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passed #1062010
lalpulsar:deb

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passed #1062009
lalpulsar:rpm

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  Lal Inference
passed #1062014
lalinference:conda

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passed #1062013
lalinference:deb

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passed #1062012
lalinference:rpm

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  Lal Apps
passed #1062017
lalapps:conda

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passed #1062016
lalapps:deb

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passed #1062015
lalapps:rpm

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  Lint
passed #1062019
lint:coala

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passed #1062018
lint:python

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  Documentation
passed #1062020
documentation

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  Integration Tests
passed #1062022
coverage

00:46:03

19.33%
passed #1062021
top-level

00:41:48