Remove editable: false support (#5987)

## Summary

This doesn't actually work yet. We'll re-add it in the future.

Closes #5958.

crates/uv-distribution/src/metadata/lowering.rs

@@ -198,7 +198,6 @@ pub(crate) fn lower_requirement(
         },
         Source::Workspace {
             workspace: is_workspace,
-            editable,
         } => {
             if !is_workspace {
                 return Err(LoweringError::WorkspaceFalse);
@@ -238,7 +237,7 @@ pub(crate) fn lower_requirement(
                 install_path: member.root().clone(),
                 lock_path: relative_to_main_workspace,
                 url,
-                editable: editable.unwrap_or(true),
+                editable: true,
             }
         }
         Source::CatchAll { .. } => {

crates/uv-workspace/src/pyproject.rs

@@ -224,8 +224,6 @@ pub enum Source {
         /// When set to `false`, the package will be fetched from the remote index, rather than
         /// included as a workspace package.
         workspace: bool,
-        /// `true` by default.
-        editable: Option<bool>,
     },
     /// A catch-all variant used to emit precise error messages when deserializing.
     CatchAll {
@@ -286,10 +284,7 @@ impl Source {
         if workspace {
             return match source {
                 RequirementSource::Registry { .. } | RequirementSource::Directory { .. } => {
-                    Ok(Some(Source::Workspace {
-                        editable,
-                        workspace: true,
-                    }))
+                    Ok(Some(Source::Workspace { workspace: true }))
                 }
                 RequirementSource::Url { .. } => {
                     Err(SourceError::WorkspacePackageUrl(name.to_string()))

crates/uv-workspace/src/workspace.rs

@@ -1555,8 +1555,7 @@ mod tests {
                 },
                 "sources": {
                   "bird-feeder": {
-                    "workspace": true,
-                    "editable": null
+                    "workspace": true
                   }
                 },
                 "pyproject_toml": {
@@ -1569,8 +1568,7 @@ mod tests {
                     "uv": {
                       "sources": {
                         "bird-feeder": {
-                          "workspace": true,
-                          "editable": null
+                          "workspace": true
                         }
                       },
                       "workspace": {

crates/uv/tests/edit.rs

@@ -1367,7 +1367,7 @@ fn add_workspace_editable() -> Result<()> {
         ]
 
         [tool.uv.sources]
-        child2 = { workspace = true, editable = true }
+        child2 = { workspace = true }
         "###
         );
     });

docs/concepts/dependencies.md

@@ -197,10 +197,9 @@ $ uv add ~/projects/bar/
 ### Workspace member
 
 To declare a dependency on a workspace member, add the member name with `{ workspace = true }`. All
-workspace members must be explicitly stated. Workspace members are
-[editable](#editable-dependencies) by default; `editable = false` may be included to install them as
-regular dependencies. See the [workspace](./workspaces.md) documentation for more details on
-workspaces.
+workspace members must be explicitly stated. Workspace members are always
+[editable](#editable-dependencies) . See the [workspace](./workspaces.md) documentation for more
+details on workspaces.
 
 ```toml title="pyproject.toml"
 [project]

uv.schema.json

@@ -1210,13 +1210,6 @@
             "workspace"
           ],
           "properties": {
-            "editable": {
-              "description": "`true` by default.",
-              "type": [
-                "boolean",
-                "null"
-              ]
-            },
             "workspace": {
               "description": "When set to `false`, the package will be fetched from the remote index, rather than included as a workspace package.",
               "type": "boolean"