Remove leftover Rust script

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

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

Author: kassens

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