Fix Clang warning unknown warning option.

--HG--
branch : develop

common.pri

@@ -492,7 +492,6 @@ CLANG_DEBUG_CXXFLAGS += \
     -Wincomplete-implementation \
     -Wincomplete-module \
     -Wincomplete-umbrella \
-    -Winherited-variadic-ctor \
     -Winit-self \
     -Winitializer-overrides \
 #    -Winline \
@@ -583,7 +582,6 @@ CLANG_DEBUG_CXXFLAGS += \
     -Wreadonly-iboutlet-property \
     -Wreceiver-expr \
     -Wreceiver-forward-class \
-    -Wreceiver-is-weak \
     -Wredundant-decls \
     -Wreinterpret-base-class \
     -Wreorder \