removed old .lua files

util.lua

@@ -1,21 +0,0 @@
-
-function terr(a)
-    local R = math.random(35, 75) / 100
-    local G = math.random(35, 75) / 100
-    local B = math.random(35, 75) / 100
-    local A = a or math.random()
-
-    return vec4(R, G, B, A)
-end
-
-function rmono()
-    return vec4(1, 1, 1, math.random())
-end
-
-function show_axes()
-    local xaxis = am.line(vec2(win.left, 0), vec2(win.right, 0))
-    local yaxis = am.line(vec2(0, win.top), vec2(0, win.bottom))
-    win.scene:append(am.translate(0, 0) ^ am.group{xaxis, yaxis}:tag"axes")
-end
-
-