Revert "debugger beta: Fix bug where debug Rust main running action f… (#31743)

…ailed (#31291)"

This reverts commit aab76208b5.

Closes #31737

I cannot repro the original issue that this commit was trying to solve
anymore.

Release Notes:

- N/A

crates/debugger_ui/src/session/running.rs

@@ -874,7 +874,6 @@ impl RunningState {
                     args,
                     ..task.resolved.clone()
                 };
-
                 let terminal = project
                     .update_in(cx, |project, window, cx| {
                         project.create_terminal(
@@ -919,6 +918,12 @@ impl RunningState {
             };
 
             if config_is_valid {
+                // Ok(DebugTaskDefinition {
+                //     label,
+                //     adapter: DebugAdapterName(adapter),
+                //     config,
+                //     tcp_connection,
+                // })
             } else if let Some((task, locator_name)) = build_output {
                 let locator_name =
                     locator_name.context("Could not find a valid locator for a build task")?;
@@ -937,7 +942,7 @@ impl RunningState {
 
                 let scenario = dap_registry
                     .adapter(&adapter)
-                    .context(format!("{}: is not a valid adapter name", &adapter))
+                    .ok_or_else(|| anyhow!("{}: is not a valid adapter name", &adapter))
                     .map(|adapter| adapter.config_from_zed_format(zed_config))??;
                 config = scenario.config;
                 Self::substitute_variables_in_config(&mut config, &task_context);