[hint_array] move hint_traits to .cc file

caching/hint_array.h

@@ -9,24 +9,6 @@
 
 namespace caching {
 	namespace hint_array_detail {
-		template <uint32_t WIDTH>
-		struct hint_traits {
-			typedef unsigned char byte;
-			typedef byte disk_type[WIDTH];
-			typedef vector<byte> value_type;
-			typedef no_op_ref_counter<value_type> ref_counter;
-
-			// FIXME: slow copying for now
-			static void unpack(disk_type const &disk, value_type &value) {
-				for (unsigned byte = 0; byte < WIDTH; byte++)
-					value.at(byte) = disk[byte];
-			}
-
-			static void pack(value_type const &value, disk_type &disk) {
-				for (unsigned byte = 0; byte < WIDTH; byte++)
-					disk[byte] = value.at(byte);
-			}
-		};
 
 		// FIXME: data visitor stuff
 	}