diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index dfd5bfe..bbf217f 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,3 +1,3 @@
 [toolchain]
-channel = "1.80.0"
+channel = "1.81.0"
 profile = "default"
diff --git a/src/version.rs b/src/version.rs
index c8e524e..eb52439 100644
--- a/src/version.rs
+++ b/src/version.rs
@@ -98,13 +98,6 @@ impl Version {
   pub fn is_nightly(&self) -> bool {
     matches!(self, Self::Nightly(_))
   }
-
-  pub fn digits_only(&self) -> Option<String> {
-    match self {
-      Self::Semver(v) => Some(v.to_string().trim_start_matches('v').to_string()),
-      _ => None,
-    }
-  }
 }
 
 impl<'de> serde::Deserialize<'de> for Version {