remove redundant statements from project files

- TARGET is unnecessary if it matches the project file's basename
- CONFIG+=no_private_qt_headers_warning is added by qt_build_config.prf
- load(qt_build_config) is done by .qmake.conf

Change-Id: I3eb45a758dfee34be3c78fc13d996780741c95e9
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>
Reviewed-by: Yoann Lopes <yoann.lopes@theqtcompany.com>

src/plugins/avfoundation/mediaplayer/mediaplayer.pro

-load(qt_build_config)
 
 #DEFINES += QT_DEBUG_AVF
 # Avoid clash with a variable named `slots' in a Quartz header

src/plugins/gstreamer/common.pri

 
 QT += core-private multimedia-private network
-CONFIG += no_private_qt_headers_warning
 
 qtHaveModule(widgets) {
     QT += widgets multimediawidgets-private

src/plugins/qnx-audio/audio/audio.pro

 TARGET = qtmedia_qnx_audio
-QT += multimedia-private
-CONFIG += no_private_qt_headers_warning
 
+QT += multimedia-private
 
 LIBS += -lasound
 

src/plugins/resourcepolicy/resourcepolicy.pro

 TARGET = resourceqt
 
 QT += multimedia-private
-CONFIG += no_private_qt_headers_warning link_pkgconfig
+CONFIG += link_pkgconfig
 PKGCONFIG += libresourceqt5
 
 INCLUDEPATH += $$PWD \

tests/auto/unit/qaudiodecoder/qaudiodecoder.pro

-#-------------------------------------------------
-#
-# Project created by QtCreator 2012-02-07T15:27:07
-#
-#-------------------------------------------------
-
 QT += multimedia multimedia-private testlib gui
 
 TARGET = tst_qaudiodecoder
 
-CONFIG += testcase no_private_qt_headers_warning
+CONFIG += testcase
 
 TEMPLATE = app
 

tests/auto/unit/qaudioprobe/qaudioprobe.pro

-CONFIG += testcase no_private_qt_headers_warning
+CONFIG += testcase
 TARGET = tst_qaudioprobe
 
 QT += multimedia-private testlib

tests/auto/unit/qaudiorecorder/qaudiorecorder.pro

-CONFIG += testcase no_private_qt_headers_warning
+CONFIG += testcase
 TARGET = tst_qaudiorecorder
 
 QT += multimedia-private testlib

tests/auto/unit/qmediaobject/qmediaobject.pro

-CONFIG += testcase no_private_qt_headers_warning
+CONFIG += testcase
 TARGET = tst_qmediaobject
 QT += multimedia-private testlib
 

tests/auto/unit/qmediaplayer/qmediaplayer.pro

-CONFIG += testcase no_private_qt_headers_warning
+CONFIG += testcase
 TARGET = tst_qmediaplayer
 QT += network multimedia-private testlib
 SOURCES += tst_qmediaplayer.cpp

tests/auto/unit/qmediaplayerwidgets/qmediaplayerwidgets.pro

-CONFIG += testcase no_private_qt_headers_warning
+CONFIG += testcase
 TARGET = tst_qmediaplayerwidgets
 QT += network multimedia-private multimediawidgets-private testlib widgets
 SOURCES += tst_qmediaplayerwidgets.cpp

tests/auto/unit/qmediarecorder/qmediarecorder.pro

-CONFIG += testcase no_private_qt_headers_warning
+CONFIG += testcase
 TARGET = tst_qmediarecorder
 QT += multimedia-private testlib
 SOURCES += tst_qmediarecorder.cpp

tests/auto/unit/qmediaserviceprovider/mockserviceplugin1/mockserviceplugin1.pro

-TARGET = mockserviceplugin1
 QT += multimedia-private
 
 HEADERS += ../mockservice.h

tests/auto/unit/qmediaserviceprovider/mockserviceplugin2/mockserviceplugin2.pro

-TARGET = mockserviceplugin2
 QT += multimedia-private
 
 HEADERS += ../mockservice.h

tests/auto/unit/qmediaserviceprovider/mockserviceplugin3/mockserviceplugin3.pro

-TARGET = mockserviceplugin3
 QT += multimedia-private
 
 HEADERS += ../mockservice.h

tests/auto/unit/qmediaserviceprovider/mockserviceplugin4/mockserviceplugin4.pro

-TARGET = mockserviceplugin4
 QT += multimedia-private
 
 HEADERS += ../mockservice.h

tests/auto/unit/qmediaserviceprovider/mockserviceplugin5/mockserviceplugin5.pro

-TARGET = mockserviceplugin5
 QT += multimedia-private
 
 HEADERS += ../mockservice.h

tests/auto/unit/qradiodata/qradiodata.pro

-CONFIG += testcase no_private_qt_headers_warning
+CONFIG += testcase
 TARGET = tst_qradiodata
 QT += multimedia-private testlib
 SOURCES += tst_qradiodata.cpp

tests/auto/unit/qradiotuner/qradiotuner.pro

-CONFIG += testcase no_private_qt_headers_warning
+CONFIG += testcase
 TARGET = tst_qradiotuner
 QT += multimedia-private testlib
 SOURCES += tst_qradiotuner.cpp

tests/auto/unit/qsamplecache/qsamplecache.pro

-CONFIG += no_private_qt_headers_warning testcase
+CONFIG += testcase
 TARGET = tst_qsamplecache
 
 QT += multimedia-private testlib

tests/auto/unit/qvideoprobe/qvideoprobe.pro

-CONFIG += testcase no_private_qt_headers_warning
+CONFIG += testcase
 TARGET = tst_qvideoprobe
 
 QT += multimedia-private testlib