remove cmake created variables

scripts/formulas/msdf-atlas-gen.sh

@@ -156,6 +156,10 @@ function copy() {
         cp -r msdfgen $dest_include/
         rm -rf $dest_include/msdfgen/cmake
         cp -r msdf-atlas-gen $dest_include/
+
+        # post
+        sed -i 's/MSDFGEN_PUBLIC //g' $dest_include/msdfgen/core/generator-config.h
+        sed -i 's/MSDF_ATLAS_PUBLIC //g' $dest_include/msdf-atlas-gen/Charset.h
     else
 	    echoWarning "TODO: $TYPE copy"
     fi