Removed no longer used dont_replace_c_symbols feature

Author: elichai

secp256k1-sys/build.rs

@@ -63,7 +63,6 @@ fn main() {
     } else {
         base_config.define("ECMULT_WINDOW_SIZE", Some("15")); // This is the default in the configure file (`auto`)
     }
-    #[cfg(not(feature = "dont_replace_c_symbols"))]
     base_config.define("USE_EXTERNAL_DEFAULT_CALLBACKS", Some("1"));
     #[cfg(feature = "endomorphism")]
     base_config.define("USE_ENDOMORPHISM", Some("1"));

src/lib.rs

@@ -734,7 +734,6 @@ mod tests {
 
 
     #[test]
-    #[cfg(not(feature = "dont_replace_c_symbols"))]
     fn test_manual_create_destroy() {
         let ctx_full = unsafe { ffi::secp256k1_context_create(AllPreallocated::FLAGS) };
         let ctx_sign = unsafe { ffi::secp256k1_context_create(SignOnlyPreallocated::FLAGS) };