Require let to be a statement (#594)

crates/nu-command/src/system/run_external.rs

@@ -1,7 +1,6 @@
 use std::collections::HashMap;
 use std::env;
 use std::io::{BufRead, BufReader, Write};
-use std::path::Path;
 use std::process::{Command as CommandSys, Stdio};
 use std::sync::atomic::Ordering;
 use std::sync::mpsc;
@@ -48,7 +47,7 @@ impl Command for External {
         call: &Call,
         input: PipelineData,
     ) -> Result<PipelineData, ShellError> {
-        let mut name: Spanned<String> = call.req(engine_state, stack, 0)?;
+        let name: Spanned<String> = call.req(engine_state, stack, 0)?;
         let args: Vec<Value> = call.rest(engine_state, stack, 1)?;
         let last_expression = call.has_flag("last_expression");
 
@@ -56,34 +55,6 @@ impl Command for External {
         let config = stack.get_config().unwrap_or_default();
         let env_vars_str = env_to_strings(engine_state, stack, &config)?;
 
-        // Check if this is a single call to a directory, if so auto-cd
-        let path = nu_path::expand_path(&name.item);
-        let orig = name.item.clone();
-        name.item = path.to_string_lossy().to_string();
-
-        let path = Path::new(&name.item);
-        if (orig.starts_with('.')
-            || orig.starts_with('~')
-            || orig.starts_with('/')
-            || orig.starts_with('\\'))
-            && path.is_dir()
-            && args.is_empty()
-        {
-            // We have an auto-cd
-            let _ = std::env::set_current_dir(&path);
-
-            //FIXME: this only changes the current scope, but instead this environment variable
-            //should probably be a block that loads the information from the state in the overlay
-            stack.add_env_var(
-                "PWD".into(),
-                Value::String {
-                    val: name.item.clone(),
-                    span: call.head,
-                },
-            );
-            return Ok(PipelineData::new(call.head));
-        }
-
         let mut args_strs = vec![];
 
         for arg in args {