remove pyOpenSSL stubs

[ashm-dev]

Closes #12392

[github-actions]

Diff from mypy_primer, showing the effect of this PR on open source code:

urllib3 (https://github.com/urllib3/urllib3)
- src/urllib3/contrib/pyopenssl.py:43: error: Unused "type: ignore" comment  [unused-ignore]
- src/urllib3/contrib/pyopenssl.py:64: error: Unused "type: ignore" comment  [unused-ignore]
- src/urllib3/contrib/pyopenssl.py:322: error: Unused "type: ignore" comment  [unused-ignore]
- src/urllib3/contrib/pyopenssl.py:326: error: Unused "type: ignore" comment  [unused-ignore]
- src/urllib3/contrib/pyopenssl.py:353: error: Unused "type: ignore" comment  [unused-ignore]
- src/urllib3/contrib/pyopenssl.py:392: error: Unused "type: ignore" comment  [unused-ignore]
- src/urllib3/contrib/pyopenssl.py:392: error: Incompatible return value type (got "X509 | None", expected "dict[str, list[Any]] | None")  [return-value]
- src/urllib3/contrib/pyopenssl.py:392: note: Error code "return-value" not covered by "type: ignore" comment
- src/urllib3/contrib/pyopenssl.py:395: error: Unused "type: ignore" comment  [unused-ignore]
- src/urllib3/contrib/pyopenssl.py:395: error: Incompatible return value type (got "bytes", expected "dict[str, list[Any]] | None")  [return-value]
- src/urllib3/contrib/pyopenssl.py:395: note: Error code "return-value" not covered by "type: ignore" comment
- src/urllib3/contrib/pyopenssl.py:403: error: Unused "type: ignore" comment  [unused-ignore]
- src/urllib3/contrib/pyopenssl.py:466: error: Argument 1 to "load_verify_locations" of "Context" has incompatible type "BytesIO"; expected "str | None"  [arg-type]
- src/urllib3/contrib/pyopenssl.py:488: error: Unused "type: ignore" comment  [unused-ignore]
- src/urllib3/contrib/pyopenssl.py:488: error: Argument 1 to "set_alpn_protos" of "Context" has incompatible type "list[bytes | str]"; expected "Sequence[bytes]"  [arg-type]
- src/urllib3/contrib/pyopenssl.py:488: note: Error code "arg-type" not covered by "type: ignore" comment
- test/contrib/test_pyopenssl.py:10: error: Unused "type: ignore" comment  [unused-ignore]
- test/contrib/test_pyopenssl.py:99: error: Argument 2 to "load_certificate" has incompatible type "str"; expected "bytes"  [arg-type]

mitmproxy (https://github.com/mitmproxy/mitmproxy)
+ mitmproxy/certs.py:16: error: Library stubs not installed for "OpenSSL"  [import-untyped]
+ mitmproxy/certs.py:412: error: Unused "type: ignore" comment  [unused-ignore]
+ mitmproxy/certs.py:415: error: Unused "type: ignore" comment  [unused-ignore]
+ mitmproxy/certs.py:416: error: Unused "type: ignore" comment  [unused-ignore]
+ mitmproxy/certs.py:417: error: Unused "type: ignore" comment  [unused-ignore]
+ mitmproxy/certs.py:419: error: Unused "type: ignore" comment  [unused-ignore]
+ mitmproxy/certs.py:420: error: Unused "type: ignore" comment  [unused-ignore]
+ mitmproxy/certs.py:421: error: Unused "type: ignore" comment  [unused-ignore]
+ mitmproxy/certs.py:423: error: Unused "type: ignore" comment  [unused-ignore]
+ mitmproxy/net/tls.py:13: error: Library stubs not installed for "OpenSSL"  [import-untyped]
+ mitmproxy/net/tls.py:15: error: Library stubs not installed for "OpenSSL.crypto"  [import-untyped]
+ mitmproxy/net/tls.py:36: error: Unused "type: ignore" comment  [unused-ignore]
+ mitmproxy/net/tls.py:134: error: Unused "type: ignore" comment  [unused-ignore]
+ mitmproxy/net/tls.py:135: error: Unused "type: ignore" comment  [unused-ignore]
+ mitmproxy/net/tls.py:261: error: Unused "type: ignore" comment  [unused-ignore]
+ mitmproxy/net/tls.py:262: error: Unused "type: ignore" comment  [unused-ignore]
+ mitmproxy/utils/debug.py:13: error: Library stubs not installed for "OpenSSL"  [import-untyped]
+ mitmproxy/tls.py:5: error: Library stubs not installed for "OpenSSL"  [import-untyped]
+ mitmproxy/proxy/layers/tls.py:11: error: Library stubs not installed for "OpenSSL"  [import-untyped]
+ mitmproxy/proxy/layers/tls.py:243: error: Unused "type: ignore" comment  [unused-ignore]
+ mitmproxy/proxy/layers/tls.py:318: error: Unused "type: ignore" comment  [unused-ignore]
+ mitmproxy/proxy/layers/tls.py:319: error: Unused "type: ignore" comment  [unused-ignore]
+ mitmproxy/proxy/layers/tls.py:320: error: Unused "type: ignore" comment  [unused-ignore]
+ mitmproxy/proxy/layers/quic/_stream_layers.py:588: error: Unused "type: ignore" comment  [unused-ignore]
+ mitmproxy/proxy/server.py:23: error: Library stubs not installed for "OpenSSL"  [import-untyped]
+ mitmproxy/addons/tlsconfig.py:13: error: Library stubs not installed for "OpenSSL"  [import-untyped]
+ mitmproxy/addons/tlsconfig.py:13: note: Hint: "python3 -m pip install types-pyOpenSSL"
+ mitmproxy/addons/tlsconfig.py:13: note: (or run "mypy --install-types" to install all missing stub packages)
+ mitmproxy/addons/tlsconfig.py:13: note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports
+ mitmproxy/addons/tlsconfig.py:80: error: Unused "type: ignore" comment  [unused-ignore]
+ mitmproxy/addons/tlsconfig.py:81: error: Unused "type: ignore" comment  [unused-ignore]
+ mitmproxy/addons/tlsconfig.py:352: error: Unused "type: ignore" comment  [unused-ignore]
+ mitmproxy/addons/tlsconfig.py:356: error: Unused "type: ignore" comment  [unused-ignore]
+ mitmproxy/addons/tlsconfig.py:363: error: Unused "type: ignore" comment  [unused-ignore]
+ mitmproxy/addons/tlsconfig.py:366: error: Unused "type: ignore" comment  [unused-ignore]
+ mitmproxy/addons/tlsconfig.py:370: error: Unused "type: ignore" comment  [unused-ignore]
+ mitmproxy/addons/tlsconfig.py:371: error: Unused "type: ignore" comment  [unused-ignore]

aiortc (https://github.com/aiortc/aiortc)
+ src/aiortc/rtcdtlstransport.py:16: error: Library stubs not installed for "OpenSSL"  [import-untyped]
+ src/aiortc/rtcdtlstransport.py:16: note: Hint: "python3 -m pip install types-pyOpenSSL"
+ src/aiortc/rtcdtlstransport.py:16: note: (or run "mypy --install-types" to install all missing stub packages)
+ src/aiortc/rtcdtlstransport.py:16: note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports
- src/aiortc/rtcdtlstransport.py:190: error: Argument 1 to "from_cryptography_key" of "PKey" has incompatible type "EllipticCurvePrivateKey"; expected "DSAPrivateKey | DSAPublicKey | RSAPrivateKey | RSAPublicKey"  [arg-type]
- src/aiortc/rtcdtlstransport.py:476: error: Argument 1 to "get_key_and_salt" of "SRTPProtectionProfile" has incompatible type "buffer"; expected "bytes"  [arg-type]
- src/aiortc/rtcdtlstransport.py:477: error: Argument 1 to "get_key_and_salt" of "SRTPProtectionProfile" has incompatible type "buffer"; expected "bytes"  [arg-type]
- src/aiortc/rtcdtlstransport.py:479: error: Argument 1 to "get_key_and_salt" of "SRTPProtectionProfile" has incompatible type "buffer"; expected "bytes"  [arg-type]
- src/aiortc/rtcdtlstransport.py:480: error: Argument 1 to "get_key_and_salt" of "SRTPProtectionProfile" has incompatible type "buffer"; expected "bytes"  [arg-type]

[srittau]

Thanks!