Remove additional 'because' (#2849)

## Summary

Is this, perhaps, not totally necessary? It doesn't show up in any
fixtures beyond those that I added recently.

Closes https://github.com/astral-sh/uv/issues/2846.

crates/uv-resolver/src/resolver/mod.rs

@@ -429,18 +429,10 @@ impl<
                     .await?
                 {
                     Dependencies::Unavailable(reason) => {
-                        let message = {
-                            if matches!(package, PubGrubPackage::Root(_)) {
-                                // Including front-matter for the root package is redundant
-                                reason.clone()
-                            } else {
-                                format!("its dependencies are unusable because {reason}")
-                            }
-                        };
                         state.add_incompatibility(Incompatibility::unavailable(
                             package.clone(),
                             version.clone(),
-                            message,
+                            reason.clone(),
                         ));
                         continue;
                     }

crates/uv/tests/pip_compile.rs

@@ -4569,10 +4569,9 @@ fn invalid_metadata_requires_python() -> Result<()> {
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because validation==2.0.0 is unusable because its dependencies are
+      ╰─▶ Because validation==2.0.0 is unusable because the package metadata could
-          unusable because the package metadata could not be parsed and you
+          not be parsed and you require validation==2.0.0, we can conclude that
-          require validation==2.0.0, we can conclude that the requirements are
+          the requirements are unsatisfiable.
-          unsatisfiable.
     "###
     );
 
@@ -4598,10 +4597,9 @@ fn invalid_metadata_multiple_dist_info() -> Result<()> {
 
     ----- stderr -----
       × No solution found when resolving dependencies:
-      ╰─▶ Because validation==3.0.0 is unusable because its dependencies
+      ╰─▶ Because validation==3.0.0 is unusable because the package has an invalid
-          are unusable because the package has an invalid format and you
+          format and you require validation==3.0.0, we can conclude that the
-          require validation==3.0.0, we can conclude that the requirements are
+          requirements are unsatisfiable.
-          unsatisfiable.
     "###
     );
 

scripts/packages/dependent_editables/second_editable/.gitignore

@@ -1,2 +1,3 @@
 # Artifacts from the build process.
 *.egg-info/
+build/