Remove extern crate (#5922)

* Remove extern crate

beacon_node/store/src/lib.rs

@@ -7,9 +7,6 @@
 //!
 //! Provides a simple API for storing/retrieving all types that sometimes needs type-hints. See
 //! tests for implementation examples.
-#[macro_use]
-extern crate lazy_static;
-
 mod chunk_writer;
 pub mod chunked_iter;
 pub mod chunked_vector;

beacon_node/store/src/metrics.rs

@@ -1,6 +1,7 @@
 pub use lighthouse_metrics::{set_gauge, try_create_int_gauge, *};
 
 use directory::size_of_dir;
+use lazy_static::lazy_static;
 use std::path::Path;
 
 lazy_static! {