remove the blake2b compat checker script

this was used to compare compatibility of our vendored
blake2b code (which we do not have any more) against the
python stdlib blake2b code (which we always use now anyway).

scripts/py36-blake2.py

@@ -1,35 +0,0 @@
-"""
-This script checks compatibility of crypto.blake2b_256 against hashlib.blake2b in CPython 3.6.
-"""
-
-import hashlib
-import sys
-
-
-def test_b2(b2_input, b2_output):
-    digest = hashlib.blake2b(b2_input, digest_size=32).digest()
-    identical = b2_output == digest
-
-    print('Input:     ', b2_input.hex())
-    print('Expected:  ', b2_output.hex())
-    print('Calculated:', digest.hex())
-    print('Identical: ', identical)
-    print()
-    if not identical:
-        sys.exit(1)
-
-
-test_b2(
-    bytes.fromhex('037fb9b75b20d623f1d5a568050fccde4a1b7c5f5047432925e941a17c7a2d0d7061796c6f6164'),
-    bytes.fromhex('a22d4fc81bb61c3846c334a09eaf28d22dd7df08c9a7a41e713ef28d80eebd45')
-)
-
-test_b2(
-    b'abc',
-    bytes.fromhex('bddd813c634239723171ef3fee98579b94964e3bb1cb3e427262c8c068d52319')
-)
-
-test_b2(
-    bytes.fromhex('e944973af2256d4d670c12dd75304c319f58f4e40df6fb18ef996cb47e063676') + b'1234567890' * 100,
-    bytes.fromhex('97ede832378531dd0f4c668685d166e797da27b47d8cd441e885b60abd5e0cb2'),
-)