Modify formatting for textureReferences

We don't program the numChannels and format members (these are HCC specific), so printing these will only display garbage.

Change-Id: I83dc8be9a3cae2659c64f4594d07c05330d2dd14

vdi/hip_formatting.hpp

@@ -712,10 +712,6 @@ inline std::ostream& operator<<(std::ostream& os, const textureReference& s) {
   << s.maxMipmapLevelClamp
   << ','
   << s.textureObject
-  << ','
-  << s.numChannels
-  << ','
-  << s.format
   << '}';
   return os;
 }