view: extract remove_remote() from git module

This will be just self.data.remote_views.remove(remote_name), so I'm not gonna
refactor the implementation at this point.

lib/src/git.rs

@@ -841,12 +841,7 @@ pub fn remove_remote(
 }
 
 fn remove_remote_refs(mut_repo: &mut MutableRepo, remote_name: &str) {
-    let mut branches_to_delete = vec![];
-    for (branch, target) in mut_repo.view().branches() {
-        if target.remote_targets.contains_key(remote_name) {
-            branches_to_delete.push(branch.clone());
-        }
-    }
+    mut_repo.remove_remote(remote_name);
     let prefix = format!("refs/remotes/{remote_name}/");
     let git_refs_to_delete = mut_repo
         .view()
@@ -855,9 +850,6 @@ fn remove_remote_refs(mut_repo: &mut MutableRepo, remote_name: &str) {
         .filter(|&r| r.starts_with(&prefix))
         .cloned()
         .collect_vec();
-    for branch in branches_to_delete {
-        mut_repo.set_remote_branch_target(&branch, remote_name, RefTarget::absent());
-    }
     for git_ref in git_refs_to_delete {
         mut_repo.set_git_ref_target(&git_ref, RefTarget::absent());
     }

lib/src/repo.rs

@@ -1007,6 +1007,10 @@ impl MutableRepo {
             .set_remote_branch_target(name, remote_name, target);
     }
 
+    pub fn remove_remote(&mut self, remote_name: &str) {
+        self.view_mut().remove_remote(remote_name);
+    }
+
     pub fn rename_remote(&mut self, old: &str, new: &str) {
         self.view_mut().rename_remote(old, new);
     }

lib/src/view.rs

@@ -272,6 +272,18 @@ impl View {
             })
     }
 
+    pub fn remove_remote(&mut self, remote_name: &str) {
+        let mut branches_to_delete = vec![];
+        for (branch, target) in &self.data.branches {
+            if target.remote_targets.contains_key(remote_name) {
+                branches_to_delete.push(branch.clone());
+            }
+        }
+        for branch in branches_to_delete {
+            self.remove_remote_branch(&branch, remote_name);
+        }
+    }
+
     pub fn rename_remote(&mut self, old: &str, new: &str) {
         for branch in self.data.branches.values_mut() {
             let target = branch.remote_targets.remove(old).flatten();