Delete old layouts from explanation in dwm.1

dwm.1

@@ -17,30 +17,16 @@ area on the left contains one window by default, and the stacking area
 on the right contains all other windows.  The number of master area
 windows can be adjusted from zero to an arbitrary number.
 .IP \[bu]
-monocle (normal, centred or floating)
+monocle (normal or floating master)
 
 Normal: all windows are maximised to the screen size.
 
-Centred: the screen is split into three sections with the master
-clients getting the second section and the stacking clients get the
-remaining 2 sections to be laid out in.
-
-Floating: the master clients are placed floating in the centre of the
-screen while the remaining stacking clients are placed side by side
-vertically.
-.IP \[bu]
-fibonacci (dwindle and spiral): windows are tiled in a spiralling or
-dwindling pattern.
-
-In the dwindle layout new clients tend towards the bottom left of the
-monitor while in the spiral layout clients tend towards the centre
-bottom left.
+Floating master: the master clients are placed floating in the centre
+of the screen while the remaining stacking clients are placed side by
+side vertically.
 .IP \[bu]
 deck: the stacking clients are placed floating on top of each other
 such that there are only two partitions of the screen space.
-.IP \[bu]
-gapless grid: n clients are arranged into a square of ceil(sqrt(n))
-length, where the top left is the latest client opened.
 .P
 Dialog windows are always managed floating, regardless of the layout
 applied.
@@ -171,26 +157,10 @@ Set layout to floating.
 .B Mod\-Shift\-m
 Set layout to monocle.
 
-.TP
-.B Mod\-Shift\-u
-Set layout to centred monocle.
-
 .TP
 .B Mod\-Shift\-o
 Set layout to centred floating monocle.
 
-.TP
-.B Mod\-Shift\-s
-Set layout to spiral fibonacci.
-
-.TP
-.B Mod\-Shift\-D
-Set layout to dwindle fibonacci.
-
-.TP
-.B Mod\-Shift\-g
-Set layout to gapless grid.
-
 .TP
 .B Mod\-Shift\-d
 Set layout to deck layout.