(Resizing Windows): Delete preserve-before args.

lispref/windows.texi

@@ -1966,7 +1966,7 @@ that change the size of windows and low-level functions that access
 window size.  Emacs does not permit overlapping windows or gaps between
 windows, so resizing one window affects other windows.
 
-@deffn Command enlarge-window size &optional horizontal preserve-before
+@deffn Command enlarge-window size &optional horizontal
 This function makes the selected window @var{size} lines taller,
 stealing lines from neighboring windows.  It takes the lines from one
 window at a time until that window is used up, then takes from another.
@@ -1989,11 +1989,6 @@ other windows are ``robbed.''  If it would be necessary to alter the
 size of a fixed-size window, @code{enlarge-window} gets an error
 instead.
 
-If @var{preserve-before} is non-@code{nil}, this function does not
-change the size of the siblings above or to the left of the selected
-window.  Only the size of the siblings below or to the right of the
-selected window are changed.
-
 If @var{size} is negative, this function shrinks the window by
 @minus{}@var{size} lines or columns.  If that makes the window smaller
 than the minimum size (@code{window-min-height} and
@@ -2015,7 +2010,7 @@ It could be defined as follows:
 @end example
 @end deffn
 
-@deffn Command shrink-window size &optional horizontal preserve-before
+@deffn Command shrink-window size &optional horizontal
 This function is like @code{enlarge-window} but negates the argument
 @var{size}, making the selected window smaller by giving lines (or
 columns) to the other windows.  If the window shrinks below