fix: remove slider event handling in unireader

Slider event handling has been moved to commands
module, refer to previous commit.

unireader.lua

@@ -1249,20 +1249,5 @@ function UniReader:addAllCommands()
 			end
 		end)
 	-- end panning
-	self.commands:add(KEY_INTO_SCREEN_SAVER,nil,"slider",
-		"toggle screen saver",
-		function(unireader)
-			Screen.kpv_rotation_mode = Screen.cur_rotation_mode
-			fb:setOrientation(Screen.native_rotation_mode)
-			--os.execute("killall -cont cvm")
-		end)
-	self.commands:add(KEY_OUTOF_SCREEN_SAVER,nil,"slider",
-		"toggle screen saver",
-		function(unireader)
-			os.execute("sleep 3")
-			--os.execute("killall -stop cvm")
-			fb:setOrientation(Screen.kpv_rotation_mode)
-			unireader:redrawCurrentPage()
-		end)
 	print("## defined commands "..dump(self.commands.map))
 end