go/nancy: remove fixed 'golang.org/x/net' false positive ignores

[ptrus]

Should be fixed now: sonatype-nexus-community/nancy#189

[codecov]

Codecov Report

Merging #3340 into master will decrease coverage by 0.08%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3340      +/-   ##
==========================================
- Coverage   65.34%   65.26%   -0.09%     
==========================================
  Files         371      371              
  Lines       33151    33151              
==========================================
- Hits        21662    21635      -27     
- Misses       8284     8311      +27     
  Partials     3205     3205              

Impacted Files	Coverage Δ
go/consensus/tendermint/abci/state/state.go	54.54% <0.00%> (-9.10%)	⬇️
go/staking/api/grpc.go	52.10% <0.00%> (-6.73%)	⬇️
go/consensus/tendermint/abci/mux.go	48.78% <0.00%> (-5.26%)	⬇️
go/consensus/tendermint/apps/staking/query.go	35.71% <0.00%> (-4.77%)	⬇️
go/storage/metrics.go	80.00% <0.00%> (-4.62%)	⬇️
go/worker/storage/service_external.go	48.14% <0.00%> (-3.71%)	⬇️
...n/crypto/signature/signers/memory/memory_signer.go	72.41% <0.00%> (-3.45%)	⬇️
go/worker/common/committee/node.go	74.86% <0.00%> (-2.80%)	⬇️
go/consensus/tendermint/staking/staking.go	52.83% <0.00%> (-2.52%)	⬇️
go/storage/database/database.go	68.23% <0.00%> (-2.36%)	⬇️
... and 20 more

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