Remove CUDA feature (#6094)

core/build.rs

@@ -1,50 +0,0 @@
-use std::env;
-use std::fs;
-use std::path::Path;
-use std::process::exit;
-
-fn main() {
-    println!("cargo:rerun-if-changed=build.rs");
-
-    if env::var("CARGO_FEATURE_CUDA").is_ok() {
-        if cfg!(not(target_os = "linux")) {
-            eprintln!("Error: CUDA feature is only available on Linux");
-            exit(1);
-        }
-        println!("cargo:rustc-cfg=cuda");
-
-        let perf_libs_dir = {
-            let manifest_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
-            let mut path = Path::new(&manifest_dir);
-            path = path.parent().unwrap();
-            let mut path = path.join(Path::new("target/perf-libs"));
-            path.push(env::var("SOLANA_PERF_LIBS_CUDA").unwrap_or_else(|err| {
-                eprintln!("Error: SOLANA_PERF_LIBS_CUDA not defined: {}", err);
-                exit(1);
-            }));
-            path
-        };
-        let perf_libs_dir = perf_libs_dir.to_str().unwrap();
-
-        // Ensure `perf_libs_dir` exists.  It's been observed that
-        // a cargo:rerun-if-changed= directive with a non-existent
-        // directory triggers a rebuild on every |cargo build| invocation
-        fs::create_dir_all(&perf_libs_dir).unwrap_or_else(|err| {
-            if err.kind() != std::io::ErrorKind::AlreadyExists {
-                panic!("Unable to create {}: {:?}", perf_libs_dir, err);
-            }
-        });
-        println!("cargo:rerun-if-changed={}", perf_libs_dir);
-        println!("cargo:rustc-link-search=native={}", perf_libs_dir);
-        if cfg!(windows) {
-            println!("cargo:rerun-if-changed={}/libcuda-crypt.dll", perf_libs_dir);
-        } else if cfg!(target_os = "macos") {
-            println!(
-                "cargo:rerun-if-changed={}/libcuda-crypt.dylib",
-                perf_libs_dir
-            );
-        } else {
-            println!("cargo:rerun-if-changed={}/libcuda-crypt.so", perf_libs_dir);
-        }
-    }
-}