chore: delete circle.yml

[diwakergupta]

CircleCI hasn't been used in 11+ months.

Fixes #3072

Description

Applicable issues

• fixes #

Additional info (benefits, drawbacks, caveats)

Checklist

• Test coverage for new or modified code paths
• Changelog is updated
• Required documentation changes (e.g., docs/rpc/openapi.yaml and rpc-endpoints.md for v2 endpoints, event-dispatcher.md for new events)
• New clarity functions have corresponding PR in clarity-benchmarking repo
• New integration test(s) added to bitcoin-tests.yml

[codecov]

Codecov Report

Merging #3583 (58a376f) into master (f0ed1b9) will increase coverage by 30.97%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           master    #3583       +/-   ##
===========================================
+ Coverage    0.18%   31.16%   +30.97%     
===========================================
  Files         298      297        -1     
  Lines      275049   274478      -571     
===========================================
+ Hits          512    85540    +85028     
+ Misses     274537   188938    -85599     

Impacted Files	Coverage Δ
src/chainstate/stacks/boot/bns.clar
testnet/stacks-node/src/main.rs	0.54% <0.00%> (+0.54%)	⬆️
testnet/stacks-node/src/stacks_events.rs	1.29% <0.00%> (+1.29%)	⬆️
src/clarity_cli.rs	1.52% <0.00%> (+1.52%)	⬆️
clarity/src/vm/functions/crypto.rs	5.12% <0.00%> (+5.12%)	⬆️
src/chainstate/stacks/db/transactions.rs	6.28% <0.00%> (+6.28%)	⬆️
src/chainstate/stacks/transaction.rs	7.52% <0.00%> (+7.52%)	⬆️
src/burnchains/bitcoin/bits.rs	8.90% <0.00%> (+8.90%)	⬆️
src/net/prune.rs	8.95% <0.00%> (+8.95%)	⬆️
src/chainstate/stacks/mod.rs	9.15% <0.00%> (+9.15%)	⬆️
... and 204 more

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