QmlDesigner: remove unused .pro file

Change-Id: I5ef1a6cbc56dad2b9264827c9b001676716dedda
Reviewed-by: Marco Bubke <marco.bubke@digia.com>

share/qtcreator/qml/qmlpuppet/qmlpuppet.pro

-TEMPLATE = subdirs
-
-include(qmlpuppet_utilities.pri)
-
-exists($${QT_PRIVATE_HEADERS}/QtDeclarative/private/qdeclarativecontext_p.h) {
-    minQtVersion(4, 7, 1) {
-        SUBDIRS += qmlpuppet
-    } else {
-        warning(Qt version has to be at least 4.7.1 to build qmlpuppet.)
-    }
-} else {
-    warning(Private headers for Qt required to build qmlpuppet.)
-}