Clean up SwiftLint removal

[andrewdmontgomery]

Closes #550

Description

This finishes removing SwiftLintPlugin by removing the unused dependency declaration.

It also apparently cleans up some inconsistencies with the Package.resolved files.

Testing Steps

• CI should be 🟢

[wpmobilebot]

📲 You can test the changes from this Pull Request in Gravatar SwiftUI Prototype Build by scanning the QR code below to install the corresponding build.

	App Name	Gravatar SwiftUI Prototype Build
	Build Number	1643
	Version	1.0
	Bundle ID	com.automattic.gravatar-sdk-demo-swiftui.prototype-build
	Commit	61e3d6e
	App Center Build	Gravatar SDK Demo - SwiftUI #336

Automatticians: You can use our internal self-serve MC tool to give yourself access to App Center if needed.

[wpmobilebot]

📲 You can test the changes from this Pull Request in Gravatar UIKit Prototype Build by scanning the QR code below to install the corresponding build.

	App Name	Gravatar UIKit Prototype Build
	Build Number	1643
	Version	1.0
	Bundle ID	com.automattic.gravatar-sdk-demo-uikit.prototype-build
	Commit	61e3d6e
	App Center Build	Gravatar SDK Demo - UIKit #337

Automatticians: You can use our internal self-serve MC tool to give yourself access to App Center if needed.

[etoledom]

Looking good!

Question:
Should we also remove the custom SwiftLint rule which checks the SDKLocalizedString usage? Or are we looking to use it in another way?

[andrewdmontgomery]

Question:
Should we also remove the custom SwiftLint rule which checks the SDKLocalizedString usage? Or are we looking to use it in another way?

I'm looking for another way to use it. But good catch. I'll pull it for now.

[wpmobilebot]

📲 You can test the changes from this Pull Request in Gravatar Prototype Build by scanning the QR code below to install the corresponding build.

	App Name	Gravatar Prototype Build
	Build Number	1666
	Version	1.0
	Bundle ID	com.automattic.gravatar-sdk-demo-uikit.prototype-build
	Commit	d08442a
	App Center Build	Gravatar SDK Demo - UIKit #351

Automatticians: You can use our internal self-serve MC tool to give yourself access to App Center if needed.