Merge "Remove unneccessary `extern crate` lines and use macros explicitly."

#[macro_use]

extern crate num_derive;

use clap::{Arg, ArgAction, Command};

use std::io::Write;

//! Parsing of various Bluetooth packets.

use chrono::NaiveDateTime;

use num_derive::{FromPrimitive, ToPrimitive};

use num_traits::cast::FromPrimitive;

use std::convert::TryFrom;

use std::fs::File;

//  See the License for the specific language governing permissions and

//  limitations under the License.

extern crate protoc_grpcio;

extern crate protoc_rust;

use std::env;

use std::fs;

use std::io::Write;

extern crate protoc_rust;

use pkg_config::Config;

use std::env;

use std::fs;