Cleanup build.rs

Fix compilation issues on windows

rust/build.rs

@@ -2,22 +2,12 @@
 // Copyright (c) 2023-2024 Rust Nostr Developers
 // Distributed under the MIT software license
 
-use std::process::{Command, Stdio};
-
 use lib_flutter_rust_bridge_codegen::codegen;
 use lib_flutter_rust_bridge_codegen::codegen::Config;
 
 fn main() {
     println!("cargo:rerun-if-changed=src/api");
 
-    if !is_dart_installed() {
-        panic!("Warning: dart not installed.");
-    }
-
-    if !is_flutter_installed() {
-        panic!("Warning: flutter not installed.");
-    }
-
     // Execute code generator with auto-detected config
     codegen::generate(
         Config::from_config_file("../flutter_rust_bridge.yaml")
@@ -27,21 +17,3 @@ fn main() {
     )
     .unwrap();
 }
-
-fn is_dart_installed() -> bool {
-    let output = Command::new("dart")
-        .arg("--version")
-        .stdout(Stdio::null())
-        .stderr(Stdio::null())
-        .status();
-    matches!(output, Ok(status) if status.success())
-}
-
-fn is_flutter_installed() -> bool {
-    let output = Command::new("flutter")
-        .arg("--version")
-        .stdout(Stdio::null())
-        .stderr(Stdio::null())
-        .status();
-    matches!(output, Ok(status) if status.success())
-}