package/graphicsmagick: remove BR2_USE_WCHAR condition for C++ support

While the imagemagick C++ support requires wchar, it is not the case
for the graphicsmagick C++ support, so we can drop the BR2_USE_WCHAR
condition when deciding whether or not GraphicsMagick++-config should
be tweaked.

Signed-off-by: Grzegorz Blach <grzegorz@blach.pl>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/graphicsmagick/graphicsmagick.mk

@@ -16,7 +16,7 @@ GRAPHICSMAGICK_CONFIG_SCRIPTS = GraphicsMagick-config GraphicsMagickWand-config
 # 0001-MNG-Fix-small-heap-overwrite-or-assertion.patch
 GRAPHICSMAGICK_IGNORE_CVES += CVE-2020-12672
 
-ifeq ($(BR2_INSTALL_LIBSTDCPP)$(BR2_USE_WCHAR),yy)
+ifeq ($(BR2_INSTALL_LIBSTDCPP),y)
 GRAPHICSMAGICK_CONFIG_SCRIPTS += GraphicsMagick++-config
 endif