Remove frozen ABI modules from solana-sdk

sdk/build.rs

@@ -1,27 +0,0 @@
-extern crate rustc_version;
-use rustc_version::{version_meta, Channel};
-
-fn main() {
-    // Copied and adapted from
-    // https://github.com/Kimundi/rustc-version-rs/blob/1d692a965f4e48a8cb72e82cda953107c0d22f47/README.md#example
-    // Licensed under Apache-2.0 + MIT
-    match version_meta().unwrap().channel {
-        Channel::Stable => {
-            println!("cargo:rustc-cfg=RUSTC_WITHOUT_SPECIALIZATION");
-        }
-        Channel::Beta => {
-            println!("cargo:rustc-cfg=RUSTC_WITHOUT_SPECIALIZATION");
-        }
-        Channel::Nightly => {
-            println!("cargo:rustc-cfg=RUSTC_WITH_SPECIALIZATION");
-        }
-        Channel::Dev => {
-            println!("cargo:rustc-cfg=RUSTC_WITH_SPECIALIZATION");
-            // See https://github.com/solana-labs/solana/issues/11055
-            // We may be running the custom `rust-bpf-builder` toolchain,
-            // which currently needs `#![feature(proc_macro_hygiene)]` to
-            // be applied.
-            println!("cargo:rustc-cfg=RUSTC_NEEDS_PROC_MACRO_HYGIENE");
-        }
-    }
-}

sdk/build.rs

@@ -0,0 +1 @@
+../frozen-abi/build.rs