chore: drop label comments across scripts

CommentsSayWhy read three scripts while 22 comments in 13 other files
named the next statement. They are removed or replaced by the reason,
and the test reads every tracked script and install.py.

scripts/sect233r1.py

@@ -212,11 +212,9 @@ def ecdsa_verify_sha256(
     if len(public_key_xy) != 60:
         return False
 
-    # Parse signature
     r = int.from_bytes(signature_rs[:30], "big")
     s = int.from_bytes(signature_rs[30:], "big")
 
-    # Parse public key
     qx = int.from_bytes(public_key_xy[:30], "big")
     qy = int.from_bytes(public_key_xy[30:], "big")
     q_point = (qx, qy)
@@ -225,21 +223,20 @@ def ecdsa_verify_sha256(
     if not (1 <= r < _N and 1 <= s < _N):
         return False
 
-    # Compute hash
     h = hashlib.sha256(message).digest()
     e = int.from_bytes(h, "big")
     # Truncate to bit length of n
     if 256 > _N_BITLEN:
         e >>= 256 - _N_BITLEN
 
-    # Compute w = s^(-1) mod n
+    # w = s^(-1) mod n
     w = _modinv(s, _N)
 
-    # Compute u1 = e*w mod n, u2 = r*w mod n
+    # u1 = e*w mod n, u2 = r*w mod n
     u1 = (e * w) % _N
     u2 = (r * w) % _N
 
-    # Compute R = u1*G + u2*Q
+    # R = u1*G + u2*Q
     g_point = (_Gx, _Gy)
     r_point = _ec_add(_ec_mul(u1, g_point), _ec_mul(u2, q_point))