Fix compilation on linux-g++-64 build in Pulse

The compiler used in Pulse does not support return-type and
init-self compiler flags.

src/plugins/qmldesigner/config.pri

@@ -7,17 +7,6 @@ debug {
   DEFINES += VIEWLOGGER
 }
 
-linux-g++-64 {
-    // note that -Werror = return-type \
-        is \
-        only \
-        supported \
-        with \
-        gcc \
-        >4.3
-    QMAKE_CXXFLAGS += "-Werror=return-type -Werror=init-self"
-    QMAKE_LFLAGS += "-rdynamic"
-}
 TMP_BAUHAUS_NO_OUTPUT = $$[BAUHAUS_NO_OUTPUT]
 equals(TMP_BAUHAUS_NO_OUTPUT, true):DEFINES += QT_NO_DEBUG_OUTPUT \
     QT_NO_WARNING_OUTPUT