refactor(cli): remove experimental code "module_tree_handler" (#670)

This code will eventually be superseded by
#530, removing this for now so
others don't have to touch this.

crates/oxc_cli/Cargo.toml

@@ -36,7 +36,6 @@ oxc_type_synthesis = { workspace = true }
 codespan-reporting = "0.11.1"
 
 clap              = { workspace = true }
-crossbeam-channel = { workspace = true }
 dashmap           = { workspace = true }
 ignore            = { workspace = true, features = ["simd-accel"] }
 miette            = { workspace = true, features = ["fancy-no-backtrace"] }

crates/oxc_cli/src/lint/mod.rs

@@ -1,7 +1,6 @@
 mod command;
 mod error;
 mod isolated_handler;
-mod module_tree_handler;
 mod options;
 
 use std::{io::BufWriter, sync::Arc, time::Duration};
@@ -11,10 +10,7 @@ use oxc_linter::{Linter, RuleCategory, RuleEnum, RULES};
 use rustc_hash::FxHashSet;
 
 pub use self::{error::Error, options::LintOptions};
-use self::{
-    isolated_handler::IsolatedLintHandler, module_tree_handler::ModuleTreeLintHandler,
-    options::AllowWarnDeny,
-};
+use self::{isolated_handler::IsolatedLintHandler, options::AllowWarnDeny};
 use crate::{CliRunResult, Runner};
 
 pub struct LintRunner {
@@ -48,11 +44,8 @@ impl Runner for LintRunner {
             return CliRunResult::None;
         }
 
-        let result = if Self::enable_module_tree() {
-            ModuleTreeLintHandler::new(Arc::clone(&self.options), Arc::clone(&self.linter)).run()
-        } else {
-            IsolatedLintHandler::new(Arc::clone(&self.options), Arc::clone(&self.linter)).run()
-        };
+        let result =
+            IsolatedLintHandler::new(Arc::clone(&self.options), Arc::clone(&self.linter)).run();
 
         if self.options.print_execution_times {
             self.print_execution_times();
@@ -63,11 +56,6 @@ impl Runner for LintRunner {
 }
 
 impl LintRunner {
-    /// check if the module tree should be provided when linting
-    fn enable_module_tree() -> bool {
-        matches!(std::env::var("OXC_MODULE_TREE"), Ok(x) if x == "true" || x == "1")
-    }
-
     fn print_rules() {
         let mut stdout = BufWriter::new(std::io::stdout());
         Linter::print_rules(&mut stdout);

crates/oxc_cli/src/lint/options.rs

@@ -3,9 +3,7 @@ use std::{collections::BTreeMap, env, path::PathBuf};
 use clap::ArgMatches;
 
 use super::command::lint_command;
-pub use super::{
-    error::Error, isolated_handler::IsolatedLintHandler, module_tree_handler::ModuleTreeLintHandler,
-};
+pub use super::{error::Error, isolated_handler::IsolatedLintHandler};
 use crate::runner::RunnerOptions;
 
 #[derive(Debug)]