syn: Remove bpf target support in hash feature (#3078)

CHANGELOG.md

@@ -27,6 +27,8 @@ The minor version will be incremented upon a breaking change and the patch versi
 
 ### Breaking
 
+- syn: Remove `bpf` target support in `hash` feature ([#3078](https://github.com/coral-xyz/anchor/pull/3078)).
+
 ## [0.30.1] - 2024-06-20
 
 ### Features

lang/syn/src/hash.rs

@@ -78,11 +78,6 @@ impl Hash {
         Hash(<[u8; HASH_BYTES]>::try_from(hash_slice).unwrap())
     }
 
-    #[cfg(target_arch = "bpf")]
-    pub const fn new_from_array(hash_array: [u8; HASH_BYTES]) -> Self {
-        Self(hash_array)
-    }
-
     pub fn to_bytes(self) -> [u8; HASH_BYTES] {
         self.0
     }
@@ -92,28 +87,9 @@ impl Hash {
 pub fn hashv(vals: &[&[u8]]) -> Hash {
     // Perform the calculation inline, calling this from within a program is
     // not supported
-    #[cfg(not(target_arch = "bpf"))]
-    {
-        let mut hasher = Hasher::default();
-        hasher.hashv(vals);
-        hasher.result()
-    }
-    // Call via a system call to perform the calculation
-    #[cfg(target_arch = "bpf")]
-    {
-        extern "C" {
-            fn sol_sha256(vals: *const u8, val_len: u64, hash_result: *mut u8) -> u64;
-        }
-        let mut hash_result = [0; HASH_BYTES];
-        unsafe {
-            sol_sha256(
-                vals as *const _ as *const u8,
-                vals.len() as u64,
-                &mut hash_result as *mut _ as *mut u8,
-            );
-        }
-        Hash::new_from_array(hash_result)
-    }
+    let mut hasher = Hasher::default();
+    hasher.hashv(vals);
+    hasher.result()
 }
 
 /// Return a Sha256 hash for the given data.