Remove TryFrom<PartialTargetTriple> for TargetTriple

Author: ongchi

src/dist/dist.rs

@@ -468,22 +468,6 @@ impl TargetTriple {
     }
 }
 
-impl std::convert::TryFrom<PartialTargetTriple> for TargetTriple {
-    type Error = &'static str;
-    fn try_from(value: PartialTargetTriple) -> std::result::Result<Self, Self::Error> {
-        if value.arch.is_some() && value.os.is_some() && value.env.is_some() {
-            Ok(Self(format!(
-                "{}-{}-{}",
-                value.arch.unwrap(),
-                value.os.unwrap(),
-                value.env.unwrap()
-            )))
-        } else {
-            Err("Incomplete / bad target triple")
-        }
-    }
-}
-
 impl FromStr for PartialToolchainDesc {
     type Err = anyhow::Error;
     fn from_str(name: &str) -> Result<Self> {