diff --git a/compiler/rustc_session/src/options.rs b/compiler/rustc_session/src/options.rs
index c32cf3d015f..b78d370bce0 100644
--- a/compiler/rustc_session/src/options.rs
+++ b/compiler/rustc_session/src/options.rs
@@ -1295,11 +1295,7 @@ pub(crate) fn parse_cargo_src_file_hash(
     ) -> bool {
         match v.and_then(|s| SourceFileHashAlgorithm::from_str(s).ok()) {
             Some(hash_kind) => {
-                if hash_kind.supported_in_cargo() {
-                    *slot = Some(hash_kind);
-                } else {
-                    return false;
-                }
+                *slot = Some(hash_kind);
             }
             _ => return false,
         }
diff --git a/compiler/rustc_span/src/lib.rs b/compiler/rustc_span/src/lib.rs
index 5ab1caaa220..b55465ddef7 100644
--- a/compiler/rustc_span/src/lib.rs
+++ b/compiler/rustc_span/src/lib.rs
@@ -1400,15 +1400,6 @@ pub enum SourceFileHashAlgorithm {
     Blake3,
 }
 
-impl SourceFileHashAlgorithm {
-    pub fn supported_in_cargo(&self) -> bool {
-        match self {
-            Self::Md5 | Self::Sha1 => false,
-            Self::Sha256 | Self::Blake3 => true,
-        }
-    }
-}
-
 impl Display for SourceFileHashAlgorithm {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.write_str(match self {