Revert to libstd's remove_dir_all instead of external crate.

This avoids the Windows dependencies.
The bug that caused us to switch to the crate in the first place was
addressed in Rust 1.66+ (rust-lang/rust#104558)

glean-core/Cargo.toml

@@ -42,7 +42,6 @@ crossbeam-channel = "0.5"
 thiserror = "1.0.4"
 uniffi = { version = "0.23.0", default-features = false }
 time = "0.1.40"
-remove_dir_all = "0.8.1"
 env_logger = { version = "0.10.0", default-features = false, optional = true }
 
 [target.'cfg(target_os = "android")'.dependencies]

glean-core/src/event_database/mod.rs

@@ -584,7 +584,7 @@ impl EventDatabase {
 
         // safe unwrap, only error case is poisoning
         let _lock = self.file_lock.write().unwrap();
-        remove_dir_all::remove_dir_all(&self.path)?;
+        std::fs::remove_dir_all(&self.path)?;
         create_dir_all(&self.path)?;
 
         Ok(())

glean-core/src/lib.rs

@@ -981,7 +981,7 @@ pub fn glean_test_destroy_glean(clear_stores: bool, data_path: Option<String>) {
         INITIALIZE_CALLED.store(false, Ordering::SeqCst);
     } else if clear_stores {
         if let Some(data_path) = data_path {
-            let _ = remove_dir_all::remove_dir_all(data_path).ok();
+            let _ = std::fs::remove_dir_all(data_path).ok();
         } else {
             log::warn!("Asked to clear stores before initialization, but no data path given.");
         }

glean-core/src/ping/mod.rs

@@ -358,7 +358,7 @@ impl PingMaker {
     pub fn clear_pending_pings(&self, data_path: &Path) -> Result<()> {
         let pings_dir = self.get_pings_dir(data_path, None)?;
 
-        remove_dir_all::remove_dir_all(&pings_dir)?;
+        std::fs::remove_dir_all(&pings_dir)?;
         create_dir_all(&pings_dir)?;
 
         log::debug!("All pending pings deleted");