message: Remove unused backend flags
diff: @@ -52,9 +52,5 @@ cc = "1.0"
  [features]
  debug = []
  trace = ["debug"]
  -# backend flags no longer used
  -"backend-cranelift" = []
  -"backend-singlepass" = []
  -"backend-llvm" = []
  managed = []
  deterministic-execution = ["wasmparser/deterministic"]
  