Some more bits remove from staging; SIXEL etc.

tmux.1

@@ -292,8 +292,6 @@ Rename the current session.
 Split the current pane into two, left and right.
 .It &
 Kill the current window.
-.It @
-Toggle the current pane between floating and tiled.
 .It \[aq]
 Prompt for a window index to select.
 .It \&(
@@ -3193,23 +3191,6 @@ or
 (time).
 .Fl r
 reverses the sort order.
-.Tg hidep
-.It Xo Ic hide\-pane
-.Op Fl a
-.Op Fl t Ar target\-pane
-.Xc
-.D1 Pq alias: Ic hidep
-Hide
-.Ar target\-pane
-from the tiled layout without closing it.
-The pane continues to run but is no longer visible and does not occupy any
-screen space.
-Hidden panes are shown in the status line and can be restored with
-.Ic show\-pane .
-With
-.Fl a ,
-all visible panes in the window are hidden.
-The pane must not already be hidden.
 .Tg movep
 .It Xo Ic move\-pane
 .Op Fl bdfhv
@@ -6610,7 +6591,6 @@ The following variables are available, where appropriate:
 .It Li "pane_left" Ta "" Ta "Left of pane"
 .It Li "pane_marked" Ta "" Ta "1 if this is the marked pane"
 .It Li "pane_marked_set" Ta "" Ta "1 if a marked pane is set"
-.It Li "pane_hidden_flag" Ta "" Ta "1 if pane is hidden"
 .It Li "pane_mode" Ta "" Ta "Name of pane mode, if any"
 .It Li "pane_path" Ta "" Ta "Path of pane (can be set by application)"
 .It Li "pane_pid" Ta "" Ta "PID of first process in pane"