restore-old-bindings.conf: remove unusable bindings

Remove keybindings for properties that have been removed because they
can no longer be used even if you restore them.

Replace dvb-channel-name with dvbin-channel-switch-offset.

Fix the L keybinding: it was bound to cycle-values loop when loop was an
alias for loop-playlist, but now it's an alias for loop-file.

"osd" was a command that cycles osd-level from 0 to 3.

Keep only the newest I show-text "${filename}" from mpv 0.26, the mpv
0.5 line for it is a mistake because it was bound to that in input.conf
from a749c61437 (2012) until 2e84934be7 (2017), while mpv 0.5 is from
2014.

etc/restore-old-bindings.conf

@@ -23,16 +23,14 @@ WHEEL_RIGHT   add volume 2
 
 # changed in mpv 0.26.0
 
-h cycle tv-channel -1                  # previous channel
+H cycle dvbin-channel-switch-offset up
-k cycle tv-channel +1                  # next channel
+K cycle dvbin-channel-switch-offset down
-H cycle dvb-channel-name -1            # previous channel
-K cycle dvb-channel-name +1            # next channel
 
 I show-text "${filename}"              # display filename in osd
 
 # changed in mpv 0.24.0
 
-L cycle-values loop "inf" "no"
+L cycle-values loop-playlist "inf" "no"
 
 # changed in mpv 0.10.0
 
@@ -56,11 +54,6 @@ RIGHT seek  10
 LEFT  seek -10
 + add audio-delay 0.100
 - add audio-delay -0.100
-( add balance -0.1
-) add balance 0.1
 F cycle sub-forced-events-only
-TAB cycle program
-A cycle angle
 U stop
-o osd
+o cycle-values osd-level
-I show-text "${filename}"