chore(lockfile): remove default turbo_version impl

crates/turborepo-lib/src/engine/builder.rs

@@ -579,6 +579,10 @@ mod test {
         fn global_change(&self, _other: &dyn Lockfile) -> bool {
             unreachable!()
         }
+
+        fn turbo_version(&self) -> Option<String> {
+            None
+        }
     }
 
     struct MockDiscovery;

crates/turborepo-lockfiles/src/bun/mod.rs

@@ -118,6 +118,10 @@ impl Lockfile for BunLockfile {
         // if the types don't match then we changed package managers
         any_other.downcast_ref::<Self>().is_none()
     }
+
+    fn turbo_version(&self) -> Option<String> {
+        None
+    }
 }
 
 impl Entry {

crates/turborepo-lockfiles/src/lib.rs

@@ -64,9 +64,7 @@ pub trait Lockfile: Send + Sync + Any + std::fmt::Debug {
     fn global_change(&self, other: &dyn Lockfile) -> bool;
 
     /// Return any turbo version found in the lockfile
-    fn turbo_version(&self) -> Option<String> {
-        None
-    }
+    fn turbo_version(&self) -> Option<String>;
 }
 
 /// Takes a lockfile, and a map of workspace directory paths -> (package name,

crates/turborepo-repository/src/package_graph/mod.rs

@@ -680,6 +680,10 @@ mod test {
         fn global_change(&self, _other: &dyn Lockfile) -> bool {
             unreachable!("global change detection not necessary for package graph construction")
         }
+
+        fn turbo_version(&self) -> Option<String> {
+            None
+        }
     }
 
     #[tokio::test]