enable c++11 really globally

... and remove all instances that became redundant now.
this excludes everything that comes from outside qtc, or looks like it
could "leave" it.

Change-Id: Idc8baad17cd1ffdc5e160ec48ea3292d633a2562
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

.qmake.conf

@@ -0,0 +1 @@
+CONFIG += c++11

qtcreator.pri

@@ -6,9 +6,6 @@ QTCREATOR_COMPAT_VERSION = 4.0.83
 VERSION = $$QTCREATOR_VERSION
 BINARY_ARTIFACTS_BRANCH = 4.1
 
-# enable c++11
-CONFIG += c++11
-
 defineReplace(qtLibraryTargetName) {
    unset(LIBRARY_NAME)
    LIBRARY_NAME = $$1

tests/auto/json/json.pro

@@ -1,7 +1,7 @@
 TARGET = tst_json
 QT = core testlib
 CONFIG -= app_bundle
-CONFIG += testcase c++11
+CONFIG += testcase
 
 TESTDATA += test.json test.bjson test3.json test2.json bom.json
 

tests/auto/qml/codemodel/dependencies/dependencies.pro

@@ -9,8 +9,6 @@ DEFINES+=TESTSRCDIR=\\\"$$PWD\\\"
 QT += core
 QT -= gui
 
-CONFIG += c++11
-
 TARGET = tst_dependencies
 CONFIG += console
 CONFIG -= app_bundle

tests/manual/debugger/simple/simple_test_app.pro

@@ -9,8 +9,6 @@ SOURCES +=  simple_test_app.cpp
 QT += network xml
 !isEmpty(QT.script.name): QT += script
 
-CONFIG += c++11
-
 osx {
     DEFINES += USE_CXX11
     QMAKE_CXXFLAGS += -stdlib=libc++

tests/unit/echoserver/echoserver.pro

@@ -3,7 +3,7 @@ QT       += core network
 QT       -= gui
 
 TARGET = echo
-CONFIG   += console c++11
+CONFIG   += console
 CONFIG   -= app_bundle
 
 TEMPLATE = app

tests/unit/unittest/unittest.pro

@@ -6,7 +6,7 @@ include(creator_dependency.pri)
 include(benchmark_dependency.pri)
 
 QT += core network testlib widgets
-CONFIG += console c++11 testcase object_parallel_to_source
+CONFIG += console testcase object_parallel_to_source
 CONFIG -= app_bundle
 
 OBJECTS_DIR = $$OUT_PWD/obj # workaround for qmake bug in object_parallel_to_source