install: support vX.Y.Z in addition to X.Y.Z (#8297)

automerge

clap-utils/src/input_validators.rs

@@ -86,20 +86,6 @@ pub fn is_url(string: String) -> Result<(), String> {
     }
 }
 
-pub fn is_semver(semver: &str) -> Result<(), String> {
-    match semver::Version::parse(&semver) {
-        Ok(_) => Ok(()),
-        Err(err) => Err(format!("{:?}", err)),
-    }
-}
-
-pub fn is_release_channel(channel: &str) -> Result<(), String> {
-    match channel {
-        "edge" | "beta" | "stable" => Ok(()),
-        _ => Err(format!("Invalid release channel {}", channel)),
-    }
-}
-
 pub fn is_port(port: String) -> Result<(), String> {
     port.parse::<u16>()
         .map(|_| ())