message: Remove a stray debug line.
  This fixes github.com/google/tink/issue/349
diff: @@ -44,7 +44,6 @@ type wrappedHybridEncrypt struct {
  }
  func newEncryptPrimitiveSet(ps *primitiveset.PrimitiveSet) (*wrappedHybridEncrypt, error) {
  - fmt.Println("type is:", ps.Primary.Primitive)
  if _, ok := (ps.Primary.Primitive).(tink.HybridEncrypt); !ok {
  return nil, fmt.Errorf("hybrid_factory: not a HybridEncrypt primitive")
  }
  