fix: remove pickle hasattr allowlist entries #3163

Job	Run time
Detect Changes	4s
Quick Feedback (Python 3.12)	1m 31s
Lint and Format	1m 4s
Windows Tests (Python 3.11)	1m 23s
Verify Vendored Proto Reproducibility	8s
Test Vendored TensorFlow Protos	10s
Type Check	1m 56s
Test Python 3.10	1m 35s
Build and Package	56s
Test Python 3.13	1m 13s
Dependency Audit	0s
Extras Smoke Test (${{ matrix.extra }})	0s
License Compliance	0s
Test NumPy ${{ matrix.numpy-mode }} - Python ${{ matrix.python-version }}	0s
Lock File Consistency	0s
CI Success	3s
	10m 3s

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