Remove openzeppelin dependency

[boxhock]

Description

There is a security vulnerability alert due to the version of @openzeppelin/contracts we have imported in the APY Finance adapter. However, it seems like we don't actually use this dependency.

Instead of updating the dependency in #1307, we can just remove it.

......

Changes

• Remove @openzeppelin/contracts dependency from package.json

Steps to Test

1. Run the adapter?

Quality Assurance

• If a new adapter was made, or an existing one was modified so that its environment variables have changed, update the relevant <ADAPTER_PACKAGE>/schemas/env.json and <ADAPTER_PACKAGE>/README.md
• If a new adapter was made, or an existing one was modified so that its environment variables have changed, update the relevant infra-k8s configuration file.
• The branch naming follows git flow (feature/x, chore/x, release/x, hotfix/x, fix/x) or is created from Clubhouse/Shortcut
• This is related to a maximum of one Clubhouse/Shortcut story or GitHub issue
• Types are safe (avoid TypeScript/TSLint features like any and disable, instead use more specific types)

[changeset-bot]

⚠️ No Changeset found

Latest commit: 5df2c9c

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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[codecov]

Codecov Report

Merging #1397 (5df2c9c) into develop (cf81f1b) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop    #1397   +/-   ##
========================================
  Coverage    79.67%   79.67%           
========================================
  Files          744      744           
  Lines        30360    30360           
  Branches      2273     2273           
========================================
  Hits         24190    24190           
  Misses        6170     6170           

Flag	Coverage Δ
integration	88.27% <ø> (ø)
unit	63.93% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

[austinborn]

Can you check why that build step is failing?

[boxhock]

@austinborn seems to be happening randomly because of rate-limiting or something. Will re-run it