use Deutsch-Schorr-Waite to implement acyclic_term/1 (#2128)

Cargo.lock

@@ -2047,7 +2047,6 @@ dependencies = [
  "to-syn-value",
  "to-syn-value_derive",
  "tokio",
- "topo_sort",
  "walkdir",
  "warp",
  "wasm-bindgen",
@@ -2577,12 +2576,6 @@ dependencies = [
  "tracing",
 ]
 
-[[package]]
-name = "topo_sort"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "156552d3c80df430aaac98c605a4e0eb7da8d06029cce2d40b4a6b095a34b37e"
-
 [[package]]
 name = "tower-service"
 version = "0.3.2"