Merge rust-bitcoin/rust-secp256k1#760: fix: don't randomize the global context twice

b7b999eb73162e545dd3942cc364b5d6bf993d27 fix: don't randomize the global context twice (DaniPopes)

Pull request description:

  Closes rust-bitcoin/rust-secp256k1#759.

ACKs for top commit:
  apoelstra:
    ACK b7b999eb73162e545dd3942cc364b5d6bf993d27; successfully ran local tests; thanks!

Tree-SHA512: 6f82befb20c062460f08af01d6664f6c2013c23adaa2462aabf2ab8fd19afe08d53d9b155bc8c306abecf4a0bbc5b350c997b23f675bca05ea5df435ffe980b1

Author: chain-forgexcr45

src/context.rs

@@ -46,17 +46,7 @@ pub mod global {
             static ONCE: Once = Once::new();
             static mut CONTEXT: Option<Secp256k1<All>> = None;
             ONCE.call_once(|| unsafe {
-                let mut ctx = Secp256k1::new();
-                #[cfg(all(
-                    not(target_arch = "wasm32"),
-                    feature = "rand",
-                    feature = "std",
-                    not(feature = "global-context-less-secure")
-                ))]
-                {
-                    ctx.randomize(&mut rand::thread_rng());
-                }
-                CONTEXT = Some(ctx);
+                CONTEXT = Some(Secp256k1::new());
             });
             unsafe { CONTEXT.as_ref().unwrap() }
         }