Revert "python: Enable subroot detection for pylsp and pyright (#27364)" (#29658)

This reverts commit e661a0afd6.

Closes #ISSUE

Release Notes:

- Reverted changes to Python subroot detection which could have caused
multiple python processes to be spawned when working in projects with
multiple `pyproject.toml` files.

crates/languages/src/lib.rs

@@ -2,7 +2,6 @@ use anyhow::Context as _;
 use gpui::{App, UpdateGlobal};
 use json::json_task_context;
 use node_runtime::NodeRuntime;
-use python::PyprojectTomlManifestProvider;
 use rust::CargoManifestProvider;
 use rust_embed::RustEmbed;
 use settings::SettingsStore;
@@ -303,13 +302,7 @@ pub fn init(languages: Arc<LanguageRegistry>, node: NodeRuntime, cx: &mut App) {
         anyhow::Ok(())
     })
     .detach();
-    let manifest_providers: [Arc<dyn ManifestProvider>; 2] = [
-        Arc::from(CargoManifestProvider),
-        Arc::from(PyprojectTomlManifestProvider),
-    ];
-    for provider in manifest_providers {
-        project::ManifestProviders::global(cx).register(provider);
-    }
+    project::ManifestProviders::global(cx).register(Arc::from(CargoManifestProvider));
 }
 
 #[derive(Default)]