[berkeley] Remove test directory in kimchi/js

[dannywillems]

Explain your changes:

• Berkeley counterpart of [develop] Remove test directory in kimchi/js #98  #13772. See issue Snarkyjs-bindings: remove tests in kimchi/js #13771. Depends on [berkeley] Remove test directory in kimchi/js o1-labs/o1js#1055 and [berkeley] Remove test directory in kimchi/js o1-labs/o1js-bindings#99

Explain how you tested your changes:
*

Checklist:

• Dependency versions are unchanged
  • Notify Velocity team if dependencies must change in CI
• Modified the current draft of release notes with details on what is completed or incomplete within this project
• Document code purpose, how to use it
  • Mention expected invariants, implicit constraints
• Tests were added for the new behavior
  • Document test purpose, significance of failures
  • Test names should reflect their purpose
• All tests pass (CI will check this if you didn't)
• Serialized types are in stable-versioned modules
• Does this close issues? List them

• Closes #0000

[dannywillems]

!ci-build-me

[jspada]

seems fine

[dannywillems]

!ci-build-me

[dannywillems]

Closing, see #13771 (comment)