Remove unnecessary(?) warnings_not_errors for vcl KDE code

Change-Id: I6e342aed2832d7a6ab029889a019829a349b2dce
Reviewed-on: https://gerrit.libreoffice.org/8775Reviewed-by: Stephan Bergmann <sbergman@redhat.com>
Tested-by: Stephan Bergmann <sbergman@redhat.com>

vcl/Executable_kdefilepicker.mk

@@ -34,8 +34,6 @@ $(eval $(call gb_Executable_add_generated_cxxobjects,kdefilepicker,\
 	CustomTarget/vcl/unx/kde/fpicker/kdefilepicker.moc \
 ))
 
-$(eval $(call gb_Executable_set_warnings_not_errors,kdefilepicker))
-
 # KDE/Qt consider -Wshadow more trouble than benefit
 $(eval $(call gb_Executable_add_cxxflags,kdefilepicker,\
 	-Wno-shadow \

vcl/Library_vclplug_kde.mk

@@ -69,8 +69,6 @@ $(eval $(call gb_Library_add_exception_objects,vclplug_kde,\
 	vcl/unx/kde/UnxNotifyThread \
 ))
 
-$(eval $(call gb_Library_set_warnings_not_errors,vclplug_kde))
-
 ifeq ($(OS),LINUX)
 $(eval $(call gb_Library_add_libs,vclplug_kde,\
 	-lm \