Non existent files in MANIFEST.in

[HuangJunye]

Environment

• Qiskit Terra version: fe12c26
• Python version: 3.10
• Operating system: macOS Ventura

What is happening?

See these warnings during editable build

      warning: no files found matching 'qiskit/schemas/*.json'
      warning: no files found matching 'qiskit/schemas/examples/*.json'
      warning: no files found matching '*.pyx' under directory 'qiskit'
      warning: no files found matching '*.pxd' under directory 'qiskit'
      warning: no files found matching 'test/python/pickles/*.pickle'

How can we reproduce the issue?

git clone https://github.com/Qiskit/qiskit-terra.git
cd qiskit-terrra
pip install -e .

What should happen?

No warnings

Any suggestions?

Remove these lines in MANIFEST.in

[HuangJunye]

#6658 removed the deprecated schemas. So the two lines under schemas/ folder can be removed. But I am not so sure about *.pyx, *.pxd and *.pickle