Remove extern crate usage

Summary: This hasn't been necessary for quite a while now.

Reviewed By: wangbj

Differential Revision: D33411662

fbshipit-source-id: e6f88834521809b59323aa9d14796ff31571e7b6

reverie-ptrace/src/lib.rs

@@ -60,6 +60,3 @@ pub use tracer::spawn_fn_with_config;
 pub use tracer::GdbConnection;
 pub use tracer::Tracer;
 pub use tracer::TracerBuilder;
-
-#[macro_use]
-extern crate bitflags;

reverie-ptrace/src/trace/mod.rs

@@ -507,7 +507,7 @@ struct ptrace_peeksiginfo_args {
     nr: u32,
 }
 
-bitflags! {
+bitflags::bitflags! {
     /// Flags for ptrace peeksiginfo
     pub struct PeekSigInfoFlags: u32 {
         /// dumping signals from the process-wide signal queue. signals are

reverie-syscalls/src/args/mod.rs

@@ -401,7 +401,7 @@ impl<'a> Displayable for Option<StatxPtr<'a>> {
     }
 }
 
-bitflags! {
+bitflags::bitflags! {
     /// stx_mask from statx, see linux/stat.h
     #[derive(Serialize, Deserialize)]
     pub struct StatxMask: u32 {

reverie-syscalls/src/args/poll.rs

@@ -55,7 +55,7 @@ impl Displayable for PollFd {
     }
 }
 
-bitflags! {
+bitflags::bitflags! {
     /// Flags for [`PollFd`].
     #[derive(Default, Serialize, Deserialize)]
     pub struct PollFlags: libc::c_short {

reverie-syscalls/src/lib.rs

@@ -21,9 +21,6 @@
 #[macro_use]
 mod macros;
 
-#[macro_use]
-extern crate bitflags;
-
 mod args;
 mod display;
 mod memory;