contrib: Revert "verify-commits sha1 exceptions"

This reverts commit 8ac134be5e, because it
is no longer needed.

contrib/verify-commits/allow-sha1-commits

@@ -1 +0,0 @@
-aeaa67a9eac0decb89c60a67f9755ca10cbcc1d9

contrib/verify-commits/verify-commits.py

@@ -94,8 +94,6 @@ def main():
         incorrect_sha512_allowed = f.read().splitlines()
     with open(dirname + "/trusted-keys", "r") as f:
         trusted_keys = f.read().splitlines()
-    with open(dirname + "/allow-sha1-commits", "r") as f:
-        sha1_allowed = f.read().splitlines()
 
     # Set commit and variables
     current_commit = args.commit
@@ -138,8 +136,6 @@ def main():
 
 
         os.environ['BITCOIN_VERIFY_COMMITS_ALLOW_SHA1'] = "0" if no_sha1 else "1"
-        if current_commit in sha1_allowed:
-            os.environ['BITCOIN_VERIFY_COMMITS_ALLOW_SHA1'] = "1"
         allow_revsig = current_commit in revsig_allowed
 
         # Check that the commit (and parents) was signed with a trusted key