diff --git a/libs/profile.lua b/libs/profile.lua
deleted file mode 100644
index dc8bcc0..0000000
--- a/libs/profile.lua
+++ /dev/null
@@ -1,195 +0,0 @@
-local clock = os.clock
-
---- Simple profiler written in Lua.
--- @module profile
--- @alias profile
-local profile = {}
-
--- function labels
-local _labeled = {}
--- function definitions
-local _defined = {}
--- time of last call
-local _tcalled = {}
--- total execution time
-local _telapsed = {}
--- number of calls
-local _ncalls = {}
--- list of internal profiler functions
-local _internal = {}
-
---- This is an internal function.
--- @tparam string event Event type
--- @tparam number line Line number
--- @tparam[opt] table info Debug info table
-function profile.hooker(event, line, info)
-	info = info or debug.getinfo(2, "fnS")
-	local f = info.func
-	-- ignore the profiler itself
-	if _internal[f] or info.what ~= "Lua" then
-		return
-	end
-	-- get the function name if available
-	if info.name then
-		_labeled[f] = info.name
-	end
-	-- find the line definition
-	if not _defined[f] then
-		_defined[f] = info.short_src .. ":" .. info.linedefined
-		_ncalls[f] = 0
-		_telapsed[f] = 0
-	end
-	if _tcalled[f] then
-		local dt = clock() - _tcalled[f]
-		_telapsed[f] = _telapsed[f] + dt
-		_tcalled[f] = nil
-	end
-	if event == "tail call" then
-		local prev = debug.getinfo(3, "fnS")
-		profile.hooker("return", line, prev)
-		profile.hooker("call", line, info)
-	elseif event == "call" then
-		_tcalled[f] = clock()
-	else
-		_ncalls[f] = _ncalls[f] + 1
-	end
-end
-
---- Sets a clock function to be used by the profiler.
--- @tparam function func Clock function that returns a number
-function profile.setclock(f)
-	assert(type(f) == "function", "clock must be a function")
-	clock = f
-end
-
---- Starts collecting data.
-function profile.start()
-	if rawget(_G, "jit") then
-		jit.off()
-		jit.flush()
-	end
-	debug.sethook(profile.hooker, "cr")
-end
-
---- Stops collecting data.
-function profile.stop()
-	debug.sethook()
-	for f in pairs(_tcalled) do
-		local dt = clock() - _tcalled[f]
-		_telapsed[f] = _telapsed[f] + dt
-		_tcalled[f] = nil
-	end
-	-- merge closures
-	local lookup = {}
-	for f, d in pairs(_defined) do
-		local id = (_labeled[f] or "?") .. d
-		local f2 = lookup[id]
-		if f2 then
-			_ncalls[f2] = _ncalls[f2] + (_ncalls[f] or 0)
-			_telapsed[f2] = _telapsed[f2] + (_telapsed[f] or 0)
-			_defined[f], _labeled[f] = nil, nil
-			_ncalls[f], _telapsed[f] = nil, nil
-		else
-			lookup[id] = f
-		end
-	end
-	collectgarbage("collect")
-end
-
---- Resets all collected data.
-function profile.reset()
-	for f in pairs(_ncalls) do
-		_ncalls[f] = 0
-	end
-	for f in pairs(_telapsed) do
-		_telapsed[f] = 0
-	end
-	for f in pairs(_tcalled) do
-		_tcalled[f] = nil
-	end
-	collectgarbage("collect")
-end
-
---- This is an internal function.
--- @tparam function a First function
--- @tparam function b Second function
--- @treturn boolean True if "a" should rank higher than "b"
-function profile.comp(a, b)
-	local dt = _telapsed[b] - _telapsed[a]
-	if dt == 0 then
-		return _ncalls[b] < _ncalls[a]
-	end
-	return dt < 0
-end
-
---- Generates a report of functions that have been called since the profile was started.
--- Returns the report as a numeric table of rows containing the rank, function label, number of calls, total execution time and source code line number.
--- @tparam[opt] number limit Maximum number of rows
--- @treturn table Table of rows
-function profile.query(limit)
-	local t = {}
-	for f, n in pairs(_ncalls) do
-		if n > 0 then
-			t[#t + 1] = f
-		end
-	end
-	table.sort(t, profile.comp)
-	if limit then
-		while #t > limit do
-			table.remove(t)
-		end
-	end
-	for i, f in ipairs(t) do
-		local dt = 0
-		if _tcalled[f] then
-			dt = clock() - _tcalled[f]
-		end
-		t[i] = { i, _labeled[f] or "?", _ncalls[f], _telapsed[f] + dt, _defined[f] }
-	end
-	return t
-end
-
-local cols = { 3, 29, 11, 24, 32 }
-
---- Generates a text report of functions that have been called since the profile was started.
--- Returns the report as a string that can be printed to the console.
--- @tparam[opt] number limit Maximum number of rows
--- @treturn string Text-based profiling report
-function profile.report(n)
-	local out = {}
-	local report = profile.query(n)
-	for i, row in ipairs(report) do
-		for j = 1, 5 do
-			local s = row[j]
-			local l2 = cols[j]
-			s = tostring(s)
-			local l1 = s:len()
-			if l1 < l2 then
-				s = s .. (" "):rep(l2 - l1)
-			elseif l1 > l2 then
-				s = s:sub(l1 - l2 + 1, l1)
-			end
-			row[j] = s
-		end
-		out[i] = table.concat(row, " | ")
-	end
-
-	local row =
-		" +-----+-------------------------------+-------------+--------------------------+----------------------------------+ \n"
-	local col =
-		" | #   | Function                      | Calls       | Time                     | Code                             | \n"
-	local sz = row .. col .. row
-	if #out > 0 then
-		sz = sz .. " | " .. table.concat(out, " | \n | ") .. " | \n"
-	end
-	return "\n" .. sz .. row
-end
-
--- store all internal profiler functions
-for _, v in pairs(profile) do
-	if type(v) == "function" then
-		_internal[v] = true
-	end
-end
-
-return profile