diff --git a/Cargo.lock b/Cargo.lock
index 4fa9dbcf51..dcf6240a27 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -40,7 +40,6 @@ dependencies = [
  "rustc-hash",
  "shlex",
  "syn 2.0.18",
- "which",
 ]
 
 [[package]]
@@ -661,17 +660,6 @@ version = "0.11.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
 
-[[package]]
-name = "which"
-version = "4.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2441c784c52b289a054b7201fc93253e288f094e2f4be9058343127c4226a269"
-dependencies = [
- "either",
- "libc",
- "once_cell",
-]
-
 [[package]]
 name = "winapi"
 version = "0.3.9"
diff --git a/bindgen-cli/Cargo.toml b/bindgen-cli/Cargo.toml
index 24066c4c34..40b4b4cb4b 100644
--- a/bindgen-cli/Cargo.toml
+++ b/bindgen-cli/Cargo.toml
@@ -28,12 +28,10 @@ log = { version = "0.4", optional = true }
 shlex = "1"
 
 [features]
-default = ["logging", "runtime", "which-rustfmt"]
+default = ["logging", "runtime"]
 logging = ["bindgen/logging", "dep:env_logger", "dep:log"]
 static = ["bindgen/static"]
 runtime = ["bindgen/runtime"]
-# Dynamically discover a `rustfmt` binary using the `which` crate
-which-rustfmt = ["bindgen/which-rustfmt"]
 prettyplease = ["bindgen/prettyplease"]
 
 ## The following features are for internal use and they shouldn't be used if
diff --git a/bindgen-tests/Cargo.toml b/bindgen-tests/Cargo.toml
index 1c06c3f10d..a253b349b9 100644
--- a/bindgen-tests/Cargo.toml
+++ b/bindgen-tests/Cargo.toml
@@ -19,7 +19,6 @@ owo-colors = "3.5.0"
 logging = ["bindgen/logging"]
 static = ["bindgen/static"]
 runtime = ["bindgen/runtime"]
-which-rustfmt = ["bindgen/which-rustfmt"]
 
 __testing_only_extra_assertions = ["bindgen/__testing_only_extra_assertions"]
 __testing_only_libclang_9 = ["bindgen/__testing_only_libclang_9"]
diff --git a/bindgen/Cargo.toml b/bindgen/Cargo.toml
index 95293daf61..4e3ad81bfc 100644
--- a/bindgen/Cargo.toml
+++ b/bindgen/Cargo.toml
@@ -40,15 +40,14 @@ regex = { version = "1.5.3", default-features = false, features = ["std", "unico
 rustc-hash = "1.0.1"
 shlex = "1"
 syn = { version = "2.0", features = ["full", "extra-traits", "visit-mut"] }
-which = { version = "4.2.1", optional = true, default-features = false }
 
 [features]
-default = ["logging", "prettyplease", "runtime", "which-rustfmt"]
+default = ["logging", "prettyplease", "runtime"]
 logging = ["dep:log"]
 static = ["clang-sys/static"]
 runtime = ["clang-sys/runtime"]
-# Dynamically discover a `rustfmt` binary using the `which` crate
-which-rustfmt = ["dep:which"]
+# This feature is no longer used for anything and should be removed in bindgen 0.70
+which-rustfmt = []
 experimental = ["dep:annotate-snippets"]
 
 ## The following features are for internal use and they shouldn't be used if
diff --git a/bindgen/lib.rs b/bindgen/lib.rs
index c2df8a8a1f..84dc111123 100644
--- a/bindgen/lib.rs
+++ b/bindgen/lib.rs
@@ -983,14 +983,6 @@ impl Bindings {
         if let Ok(rustfmt) = env::var("RUSTFMT") {
             return Ok(Cow::Owned(rustfmt.into()));
         }
-        #[cfg(feature = "which-rustfmt")]
-        match which::which("rustfmt") {
-            Ok(p) => Ok(Cow::Owned(p)),
-            Err(e) => {
-                Err(io::Error::new(io::ErrorKind::Other, format!("{}", e)))
-            }
-        }
-        #[cfg(not(feature = "which-rustfmt"))]
         // No rustfmt binary was specified, so assume that the binary is called
         // "rustfmt" and that it is in the user's PATH.
         Ok(Cow::Owned("rustfmt".into()))