Remove superfluous project file from example

Pick-to: 6.5 6.6
Change-Id: I7599b18b29266c2b2d41437746bb2923588384d0
Reviewed-by: Jan Arve Sæther <jan-arve.saether@qt.io>

examples/quick/layouts/layouts.qmlproject

@@ -1,16 +0,0 @@
-import QmlProject 1.1
-
-Project {
-    mainFile: "main.qml"
-
-    /* Include .qml, .js, and image files from current directory and subdirectories */
-    QmlFiles {
-        directory: "."
-    }
-    JavaScriptFiles {
-        directory: "."
-    }
-    ImageFiles {
-        directory: "."
-    }
-}