Delete unused file (#772)

This is a duplicate that's not used anymore, probably a refactoring
artifact.

crates/distribution-types/src/base_url.rs

@@ -1,34 +0,0 @@
-use serde::{Deserialize, Serialize};
-use url::Url;
-
-#[derive(Debug, Clone, Hash, Eq, PartialEq, Serialize, Deserialize)]
-pub struct BaseUrl(Url);
-
-impl BaseUrl {
-    /// Parse the given URL. If it's relative, join it to the current [`BaseUrl`]. Allows for
-    /// parsing URLs that may be absolute or relative, with a known base URL.
-    pub fn join_relative(&self, url: &str) -> Result<Url, url::ParseError> {
-        match Url::parse(url) {
-            Ok(url) => Ok(url),
-            Err(err) => {
-                if err == url::ParseError::RelativeUrlWithoutBase {
-                    self.0.join(url)
-                } else {
-                    Err(err)
-                }
-            }
-        }
-    }
-}
-
-impl From<Url> for BaseUrl {
-    fn from(url: Url) -> Self {
-        Self(url)
-    }
-}
-
-impl std::fmt::Display for BaseUrl {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        self.0.fmt(f)
-    }
-}