remove docs folder

doc/events/timer.md

@@ -1,21 +0,0 @@
----
-module: [kind=event] timer
-see: os.startTimer To start a timer.
----
-
-The @{timer} event is fired when a timer started with @{os.startTimer} completes.
-
-## Return Values
-1. @{string}: The event name.
-2. @{number}: The ID of the timer that finished.
-
-## Example
-Starts a timer and then prints its ID:
-```lua
-local timerID = os.startTimer(2)
-local event, id
-repeat
-    event, id = os.pullEvent("timer")
-until id == timerID
-print("Timer with ID " .. id .. " was fired")
-```