remove contract, l2geth from monorepo

[georgehao]

Purpose or design rationale of this PR

Describe your change. Make sure to answer these three questions: What does this PR do? Why does it do it? How does it do it?

remove contract, l2geth from monorepo

PR title

Your PR title must follow conventional commits (as we are doing squash merge for each PR), so it must start with one of the following types:

• build: Changes that affect the build system or external dependencies (example scopes: yarn, eslint, typescript)
• ci: Changes to our CI configuration files and scripts (example scopes: vercel, github, cypress)
• docs: Documentation-only changes
• feat: A new feature
• fix: A bug fix
• perf: A code change that improves performance
• refactor: A code change that doesn't fix a bug, or add a feature, or improves performance
• style: Changes that do not affect the meaning of the code (white-space, formatting, missing semi-colons, etc)
• test: Adding missing tests or correcting existing tests

Deployment tag versioning

Has tag in common/version.go been updated or have you added bump-version label to this PR?

• No, this PR doesn't involve a new deployment, git tag, docker image tag
• Yes

Breaking change label

Does this PR have the breaking-change label?

• No, this PR is not a breaking change
• Yes

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 54.31%. Comparing base (eada1d0) to head (ca31b96).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #1403   +/-   ##
========================================
  Coverage    54.31%   54.31%           
========================================
  Files          156      156           
  Lines        11918    11918           
========================================
  Hits          6473     6473           
  Misses        4950     4950           
  Partials       495      495           

Flag	Coverage Δ
bridge-history-api	72.50% <ø> (ø)
database	42.85% <ø> (ø)

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[georgehao]

scroll monorepo some unit test reply on contract. can't delete it. close this pr

[georgehao]