chore: remove unused Rust projects

src/xatu/BUILD

@@ -1,20 +0,0 @@
-load("@rules_rust//rust:defs.bzl", "rust_binary", "rust_library", "rust_test")
-
-rust_library(
-    name = "xatu_lib",
-    crate_name = "xatu",
-    srcs = ["lib.rs"],
-)
-
-rust_binary(
-    name = "xatu",
-    crate_name = "xatu_cli",
-    srcs = ["main.rs"],
-    deps = [":xatu_lib"],
-)
-
-rust_test(
-    name = "lib_test",
-    srcs = ["lib_test.rs"],
-    deps = [":xatu_lib"],
-)