Simplify logic for C++ exception support

exception.prf takes care of all of this.

Change-Id: I6d8ba116a425eecf94557bdd682ca58905e6263a
Reviewed-by: Karsten Heimrich <karsten.heimrich@digia.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>

src/assistant/clucene/clucene.pro

@@ -16,18 +16,7 @@ contains(QT_CONFIG, reduce_exports) {
 }
 
 # impossible to disable exceptions in clucene atm
-CONFIG(exceptions_off) {
-    CONFIG -= exceptions_off
-    CONFIG += exceptions
-    !win32|win32-g++* {
-        QMAKE_CFLAGS -= -fno-exceptions
-        QMAKE_CXXFLAGS -= -fno-exceptions
-        QMAKE_LFLAGS -= -fno-exceptions
-        QMAKE_CFLAGS += -fexceptions
-        QMAKE_CXXFLAGS += -fexceptions
-        QMAKE_LFLAGS += -fexceptions
-    }
-}
+CONFIG += exceptions
 
 # otherwise mingw headers do not declare common functions like _i64tow
 win32-g++*:QMAKE_CXXFLAGS_CXX11 = -std=gnu++0x

src/assistant/help/help.pro

@@ -11,18 +11,7 @@ load(qt_module)
 DEFINES -= QT_ASCII_CAST_WARNINGS
 
 # impossible to disable exceptions in clucene atm and use help lib without
-CONFIG(exceptions_off) {
-    CONFIG -= exceptions_off
-    CONFIG += exceptions
-    !win32|win32-g++* {
-        QMAKE_CFLAGS -= -fno-exceptions
-        QMAKE_CXXFLAGS -= -fno-exceptions
-        QMAKE_LFLAGS -= -fno-exceptions
-        QMAKE_CFLAGS += -fexceptions
-        QMAKE_CXXFLAGS += -fexceptions
-        QMAKE_LFLAGS += -fexceptions
-    }
-}
+CONFIG += exceptions
 
 RESOURCES += helpsystem.qrc
 SOURCES += qhelpenginecore.cpp \