QtQuick: Fix & clean up alarms.pro

The current example didn't compile on Windows, because all Qt examples
require a target file.

Also clean up unnecessary parts generated by the Qt Creator wizard.

Change-Id: I40b834e544a146d3e232844e667d568b102bec5c
Reviewed-by: Paul Wicking <paul.wicking@qt.io>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>

examples/tutorials/alarms/alarms.pro

-QT += qml quick
+TEMPLATE = app
 
-CONFIG += c++11
+QT += quick
 
 SOURCES += main.cpp
 
 RESOURCES += qml.qrc
 
-# Additional import path used to resolve QML modules in Qt Creator's code model
-QML_IMPORT_PATH = $$PWD/imports
-
-# Additional import path used to resolve QML modules just for Qt Quick Designer
-QML_DESIGNER_IMPORT_PATH =
-
-# The following define makes your compiler emit warnings if you use
-# any feature of Qt which has been marked deprecated (the exact warnings
-# depend on your compiler). Please consult the documentation of the
-# deprecated API in order to know how to port your code away from it.
-DEFINES += QT_DEPRECATED_WARNINGS
-TARGET = Alarms
-# You can also make your code fail to compile if you use deprecated APIs.
-# In order to do so, uncomment the following line.
-# You can also select to disable deprecated APIs only up to a certain version of Qt.
-#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
-
-# Default rules for deployment.
-qnx: target.path = /tmp/$${TARGET}/bin
-else: unix:!android: target.path = /opt/$${TARGET}/bin
-!isEmpty(target.path): INSTALLS += target
+target.path = $$[QT_INSTALL_EXAMPLES]/demos/alarms
+INSTALLS += target