commit eda03c2

Remove the title port (which is no longer in use).

 1@@ -28,7 +28,6 @@ In the below lists, asterisks indicate 16-bit ports.
 2 
 3 00 = Vector *
 4 02 = Expansion *
 5-04 = Title *
 6 06 = Metadata *
 7 08 = Colours (red) *
 8 0A = Colours (green) *
 9@@ -43,9 +42,6 @@ operation, which is a record stored at that address; the first byte of
10 that data is the operation code, and the rest are the arguments. See the
11 below list of expansion operations.
12 
13-The title port points to a null-terminated ASCII string which may be used
14-as the window title (if supported by the emulator).
15-
16 The colours control the colours of the display, where the high nybble of
17 each controls the value for colour index 0, and the low nybble of each
18 controls the value for colour index 3.