Remove deprecated global --isolated

Because it causes a conflict with uv tool run --isolated when they are
combined.

crates/uv-cli/src/lib.rs

@@ -204,15 +204,6 @@ pub struct GlobalArgs {
     #[arg(global = true, long, overrides_with("preview"), hide = true)]
     pub no_preview: bool,
 
-    /// Avoid discovering a `pyproject.toml` or `uv.toml` file.
-    ///
-    /// Normally, configuration files are discovered in the current directory,
-    /// parent directories, or user configuration directories.
-    ///
-    /// This option is deprecated in favor of `--no-config`.
-    #[arg(global = true, long, hide = true)]
-    pub isolated: bool,
-
     /// Show the resolved settings for the current command.
     ///
     /// This option is used for debugging and development purposes.
@@ -2774,7 +2765,7 @@ pub struct AddArgs {
     pub refresh: RefreshArgs,
 
     /// Add the dependency to a specific package in the workspace.
-    #[arg(long, conflicts_with = "isolated")]
+    #[arg(long, conflicts_with = "no_config")]
     pub package: Option<PackageName>,
 
     /// Add the dependency to the specified Python script, rather than to a project.
@@ -2843,7 +2834,7 @@ pub struct RemoveArgs {
     pub refresh: RefreshArgs,
 
     /// Remove the dependencies from a specific package in the workspace.
-    #[arg(long, conflicts_with = "isolated")]
+    #[arg(long, conflicts_with = "no_config")]
     pub package: Option<PackageName>,
 
     /// Remove the dependency from the specified Python script, rather than from a project.

crates/uv/src/lib.rs

@@ -68,7 +68,7 @@ async fn run(cli: Cli) -> Result<ExitStatus> {
     }
 
     // The `--isolated` argument is deprecated on preview APIs, and warns on non-preview APIs.
-    let deprecated_isolated = if cli.global_args.isolated {
+    let deprecated_isolated = if false {
         match &*cli.command {
             // Supports `--isolated` as its own argument, so we can't warn either way.
             Commands::Tool(ToolNamespace {