[ion/kandinsky] Move unicode to ion

kandinsky/Makefile

@@ -13,8 +13,6 @@ src += $(addprefix kandinsky/src/,\
   ion_context.cpp \
   point.cpp \
   rect.cpp \
-  unicode/utf8_decoder.cpp\
-  unicode/utf8_helper.cpp\
 )
 
 src += $(addprefix kandinsky/fonts/, \
@@ -26,7 +24,6 @@ tests += $(addprefix kandinsky/test/,\
   color.cpp\
   font.cpp\
   rect.cpp\
-  utf8_decoder.cpp\
 )
 
 RASTERIZER_CFLAGS := -std=c99 `pkg-config freetype2 --cflags`