gh-97681: Remove Tools/demo/ directory (#97682)

Remove the Tools/demo/ directory which contained old demo scripts. A
copy can be found in the old-demos project:
https://github.com/gvanrossum/old-demos

Remove the following old demo scripts:

* beer.py
* eiffel.py
* hanoi.py
* life.py
* markov.py
* mcast.py
* queens.py
* redemo.py
* rpython.py
* rpythond.py
* sortvisu.py
* spreadsheet.py
* vector.py

Changes:

* Remove a reference to the redemo.py script in the regex howto
  documentation.
* Remove a reference to the removed Tools/demo/ directory in the
  curses documentation.
* Update PC/layout/ to remove the reference to Tools/demo/ directory.

1 files changed, 0 insertions, 154 deletions

diff --git a/Tools/demo/hanoi.py b/Tools/demo/hanoi.py
deleted file mode 100755
index 8db895c..0000000
--- a/Tools/demo/hanoi.py
+++ /dev/null
@@ -1,154 +0,0 @@
-#!/usr/bin/env python3
-
-"""
-Animated Towers of Hanoi using Tk with optional bitmap file in background.
-
-Usage: hanoi.py [n [bitmapfile]]
-
-n is the number of pieces to animate; default is 4, maximum 15.
-
-The bitmap file can be any X11 bitmap file (look in /usr/include/X11/bitmaps for
-samples); it is displayed as the background of the animation.  Default is no
-bitmap.
-"""
-
-from tkinter import Tk, Canvas
-
-# Basic Towers-of-Hanoi algorithm: move n pieces from a to b, using c
-# as temporary.  For each move, call report()
-def hanoi(n, a, b, c, report):
-    if n <= 0: return
-    hanoi(n-1, a, c, b, report)
-    report(n, a, b)
-    hanoi(n-1, c, b, a, report)
-
-
-# The graphical interface
-class Tkhanoi:
-
-    # Create our objects
-    def __init__(self, n, bitmap=None):
-        self.n = n
-        self.tk = tk = Tk()
-        self.canvas = c = Canvas(tk)
-        c.pack()
-        width, height = tk.getint(c['width']), tk.getint(c['height'])
-
-        # Add background bitmap
-        if bitmap:
-            self.bitmap = c.create_bitmap(width//2, height//2,
-                                          bitmap=bitmap,
-                                          foreground='blue')
-
-        # Generate pegs
-        pegwidth = 10
-        pegheight = height//2
-        pegdist = width//3
-        x1, y1 = (pegdist-pegwidth)//2, height*1//3
-        x2, y2 = x1+pegwidth, y1+pegheight
-        self.pegs = []
-        p = c.create_rectangle(x1, y1, x2, y2, fill='black')
-        self.pegs.append(p)
-        x1, x2 = x1+pegdist, x2+pegdist
-        p = c.create_rectangle(x1, y1, x2, y2, fill='black')
-        self.pegs.append(p)
-        x1, x2 = x1+pegdist, x2+pegdist
-        p = c.create_rectangle(x1, y1, x2, y2, fill='black')
-        self.pegs.append(p)
-        self.tk.update()
-
-        # Generate pieces
-        pieceheight = pegheight//16
-        maxpiecewidth = pegdist*2//3
-        minpiecewidth = 2*pegwidth
-        self.pegstate = [[], [], []]
-        self.pieces = {}
-        x1, y1 = (pegdist-maxpiecewidth)//2, y2-pieceheight-2
-        x2, y2 = x1+maxpiecewidth, y1+pieceheight
-        dx = (maxpiecewidth-minpiecewidth) // (2*max(1, n-1))
-        for i in range(n, 0, -1):
-            p = c.create_rectangle(x1, y1, x2, y2, fill='red')
-            self.pieces[i] = p
-            self.pegstate[0].append(i)
-            x1, x2 = x1 + dx, x2-dx
-            y1, y2 = y1 - pieceheight-2, y2-pieceheight-2
-            self.tk.update()
-            self.tk.after(25)
-
-    # Run -- never returns
-    def run(self):
-        while True:
-            hanoi(self.n, 0, 1, 2, self.report)
-            hanoi(self.n, 1, 2, 0, self.report)
-            hanoi(self.n, 2, 0, 1, self.report)
-            hanoi(self.n, 0, 2, 1, self.report)
-            hanoi(self.n, 2, 1, 0, self.report)
-            hanoi(self.n, 1, 0, 2, self.report)
-
-    # Reporting callback for the actual hanoi function
-    def report(self, i, a, b):
-        if self.pegstate[a][-1] != i: raise RuntimeError # Assertion
-        del self.pegstate[a][-1]
-        p = self.pieces[i]
-        c = self.canvas
-
-        # Lift the piece above peg a
-        ax1, ay1, ax2, ay2 = c.bbox(self.pegs[a])
-        while True:
-            x1, y1, x2, y2 = c.bbox(p)
-            if y2 < ay1: break
-            c.move(p, 0, -1)
-            self.tk.update()
-
-        # Move it towards peg b
-        bx1, by1, bx2, by2 = c.bbox(self.pegs[b])
-        newcenter = (bx1+bx2)//2
-        while True:
-            x1, y1, x2, y2 = c.bbox(p)
-            center = (x1+x2)//2
-            if center == newcenter: break
-            if center > newcenter: c.move(p, -1, 0)
-            else: c.move(p, 1, 0)
-            self.tk.update()
-
-        # Move it down on top of the previous piece
-        pieceheight = y2-y1
-        newbottom = by2 - pieceheight*len(self.pegstate[b]) - 2
-        while True:
-            x1, y1, x2, y2 = c.bbox(p)
-            if y2 >= newbottom: break
-            c.move(p, 0, 1)
-            self.tk.update()
-
-        # Update peg state
-        self.pegstate[b].append(i)
-
-
-def main():
-    import sys
-
-    # First argument is number of pegs, default 4
-    if sys.argv[1:]:
-        n = int(sys.argv[1])
-    else:
-        n = 4
-
-    # Second argument is bitmap file, default none
-    if sys.argv[2:]:
-        bitmap = sys.argv[2]
-        # Reverse meaning of leading '@' compared to Tk
-        if bitmap[0] == '@': bitmap = bitmap[1:]
-        else: bitmap = '@' + bitmap
-    else:
-        bitmap = None
-
-    # Create the graphical objects...
-    h = Tkhanoi(n, bitmap)
-
-    # ...and run!
-    h.run()
-
-
-# Call main when run as script
-if __name__ == '__main__':
-    main()