Remove leftover Rust script (#33314)

For now we removed Rust from the codebase, remove this leftover script.

Also remove some dupes and Rust related files from `.gitignore`.

compiler/.gitignore

@@ -1,28 +1,14 @@
 .DS_Store
 .spr.yml
 
-# Generated by Cargo
-# will have compiled files and executables
-debug/
-target/
-
-# These are backup files generated by rustfmt
-**/*.rs.bk
-
-# MSVC Windows builds of rustc generate these, which store debugging information
-*.pdb
-
 node_modules
 .watchmanconfig
 .watchman-cookie-*
 dist
 .vscode
 !packages/playground/.vscode
-.spr.yml
 testfilter.txt
 
-bundle-oss.sh
-
 # forgive
 *.vsix
 .vscode-test

compiler/scripts/rustfmt.sh

@@ -1,12 +0,0 @@
-#!/usr/bin/env bash
-# Copyright (c) Meta Platforms, Inc. and affiliates.
-#
-# This source code is licensed under the MIT license found in the
-# LICENSE file in the root directory of this source tree.
-
-set -eo pipefail
-
-# Executes rustfmt using a nightly build of the compiler
-# NOTE: this command must exactly match the Rust Lint command in .github/workflows/rust.yml
-rustup toolchain list | grep -q nightly-2023-08-01 || (echo "Expected Rust version missing, try running: 'rustup toolchain install nightly-2023-08-01'" && exit 1)
-grep -r --include "*.rs" --files-without-match "@generated" crates | xargs rustup run nightly-2023-08-01 rustfmt --config="skip_children=true" "$@"