Remove mpzpi demo

Demo/scripts/README

@@ -14,7 +14,6 @@ markov.py		Markov chain simulation of words or characters
 mboxconvvert.py		Convert MH or MMDF mailboxes to unix mailbox format
 mkrcs.py		Fix symlinks named RCS into parallel tree
 morse.py		Produce morse code (audible or on AIFF file)
-mpzpi.py		test mpz -- print digits of pi (compare pi.py)
 pi.py			Print all digits of pi -- given enough time and memory
 pp.py			Emulate some Perl command line options
 primes.py		Print prime numbers

Demo/scripts/mpzpi.py

-#! /usr/bin/env python
-# Print digits of pi forever.
-#
-# The algorithm, using Python's 'long' integers ("bignums"), works
-# with continued fractions, and was conceived by Lambert Meertens.
-#
-# See also the ABC Programmer's Handbook, by Geurts, Meertens & Pemberton,
-# published by Prentice-Hall (UK) Ltd., 1990.
-
-import sys
-from mpz import mpz
-
-def main():
-    mpzone, mpztwo, mpzten = mpz(1), mpz(2), mpz(10)
-    k, a, b, a1, b1 = mpz(2), mpz(4), mpz(1), mpz(12), mpz(4)
-    while 1:
-        # Next approximation
-        p, q, k = k*k, mpztwo*k+mpzone, k+mpzone
-        a, b, a1, b1 = a1, b1, p*a+q*a1, p*b+q*b1
-        # Print common digits
-        d, d1 = a/b, a1/b1
-        while d == d1:
-            output(d)
-            a, a1 = mpzten*(a%b), mpzten*(a1%b1)
-            d, d1 = a/b, a1/b1
-
-def output(d):
-    # Use write() to avoid spaces between the digits
-    # Use int(d) to avoid a trailing L after each digit
-    sys.stdout.write(repr(int(d)))
-    # Flush so the output is seen immediately
-    sys.stdout.flush()
-
-main()