Remove fuzz_util module

Not needed anymore as the bitcoin_hashes crate handles this.

src/fuzz_util/mod.rs

@@ -1,4 +0,0 @@
-//! This module contains all mocks that are used for fuzz testing. Never use anything from this
-//! module in production.
-
-pub mod sha2;

src/fuzz_util/sha2.rs

@@ -1,63 +0,0 @@
-//! fuzztarget-only Sha2 context with a dummy Sha256 and Sha512 hashers.
-
-use crypto::digest::Digest;
-
-#[derive(Clone, Copy)]
-/// Dummy Sha256 that hashes the input, but only returns the first byte of output, masking the
-/// rest to 0s.
-pub struct Sha256 {
-	state: u8,
-}
-
-impl Sha256 {
-	/// Constructs a new dummy Sha256 context
-	pub fn new() -> Sha256 {
-		Sha256 {
-			state: 0,
-		}
-	}
-}
-
-impl Digest for Sha256 {
-	fn result(&mut self, data: &mut [u8]) {
-		data[0] = self.state;
-		for i in 1..32 {
-			data[i] = 0;
-		}
-	}
-
-	fn input(&mut self, data: &[u8]) { for i in data { self.state ^= i; } }
-	fn reset(&mut self) { self.state = 0; }
-	fn output_bits(&self) -> usize { 256 }
-	fn block_size(&self) -> usize { 64 }
-}
-
-#[derive(Clone, Copy)]
-/// Dummy Sha512 that hashes the input, but only returns the first byte of output, masking the
-/// rest to 0s.
-pub struct Sha512 {
-	state: u8,
-}
-
-impl Sha512 {
-	/// Constructs a new dummy Sha512 context
-	pub fn new() -> Sha512 {
-		Sha512 {
-			state: 0xff,
-		}
-	}
-}
-
-impl Digest for Sha512 {
-	fn result(&mut self, data: &mut [u8]) {
-		data[0] = self.state;
-		for i in 1..64 {
-			data[i] = 0;
-		}
-	}
-
-	fn input(&mut self, data: &[u8]) { for i in data { self.state ^= i; } }
-	fn reset(&mut self) { self.state = 0xff; }
-	fn output_bits(&self) -> usize { 512 }
-	fn block_size(&self) -> usize { 128 }
-}

src/lib.rs

@@ -80,6 +80,3 @@ pub use util::hash::BitcoinHash;
 pub use util::privkey::Privkey;
 pub use util::decimal::Decimal;
 pub use util::decimal::UDecimal;
-
-#[cfg(feature = "fuzztarget")]
-pub mod fuzz_util;