ci: remove stale ci/spell-checker configuration

[spacewander]

No description provided.

[codecov-commenter]

Codecov Report

Merging #519 (8558116) into master (5d479ae) will decrease coverage by 0.89%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #519      +/-   ##
==========================================
- Coverage   37.04%   36.14%   -0.90%     
==========================================
  Files          47       54       +7     
  Lines        3841     4299     +458     
==========================================
+ Hits         1423     1554     +131     
- Misses       2233     2533     +300     
- Partials      185      212      +27     

Impacted Files	Coverage Δ
pkg/kube/translation/util.go	47.19% <0.00%> (-13.68%)	⬇️
pkg/kube/translation/translator.go	45.67% <0.00%> (-5.71%)	⬇️
pkg/apisix/cluster.go	23.46% <0.00%> (-3.58%)	⬇️
pkg/apisix/ssl.go	32.06% <0.00%> (-2.98%)	⬇️
pkg/apisix/nonexistentclient.go	53.84% <0.00%> (-1.16%)	⬇️
pkg/apisix/apisix.go	63.63% <0.00%> (-1.07%)	⬇️
pkg/apisix/cache/memdb.go	67.46% <0.00%> (-0.09%)	⬇️
pkg/ingress/secret.go	0.00% <0.00%> (ø)
pkg/ingress/ingress.go	8.58% <0.00%> (ø)
pkg/ingress/endpoint.go	0.00% <0.00%> (ø)
... and 17 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 4a55307...8558116. Read the comment docs.