chore(examples): delete banned-language examples per strict CLAUDE.md policy

Per CLAUDE.md project language policy (Hyperpolymath Standard):
  * Go        → Rust replacement
  * Java/Kotlin → Rust / Tauri / Dioxus replacement
  * Swift     → Tauri / Dioxus replacement
  * Ruby/Perl → blocked by language-policy.yml CI

Deleted:
  examples/go/nop.go
  examples/java/{BalancedOps,Nop}.java
  examples/kotlin/{BalancedOps,Nop}.kt
  examples/perl/nop.pl
  examples/ruby/nop.rb
  examples/swift/Nop.swift

Cross-language CNO demonstrations preserved in 23 still-allowed
languages (ada, brainfuck, c, clojure, cobol, cpp, csharp, elixir,
erlang, fortran, fsharp, haskell, javascript, lisp, malbolge, ocaml,
php, prolog, rust, scala, scheme, special-ops, whitespace).

Resolves the "Language / package anti-pattern policy" governance CI
check on PR #41.

Author: claude