Remove unnecessary uses of "takeScreenshot" (#349)

orx-timer/src/demo/kotlin/DemoRepeat02.kt

@@ -1,7 +1,6 @@
 import org.openrndr.application
 import org.openrndr.color.ColorRGBa
 import org.openrndr.events.Event
-import org.openrndr.extensions.SingleScreenshot
 import org.openrndr.extra.timer.repeat
 
 /**
@@ -19,11 +18,6 @@ fun main() = application {
             // -- we can not draw here, so we relay the repeat signal to the event
             event.trigger(null)
         }
-        if (System.getProperty("takeScreenshot") == "true") {
-            extend(SingleScreenshot()) {
-                this.outputFile = System.getProperty("screenshotPath")
-            }
-        }
         extend {
             drawer.clear(ColorRGBa.PINK)
             // -- by explicitly calling deliver we know that the drawing code in the listener will be