Exclude examples requiring sol-parser-sdk from workspace

These examples depend on a local path to sol-parser-sdk which is not
available in the public repo, causing build failures for consumers.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Cargo.toml

@@ -19,8 +19,6 @@ members = [
     "examples/trading_client",
     "examples/shared_infrastructure",
     "examples/middleware_system",
-    "examples/pumpfun_copy_trading",
-    "examples/pumpfun_sniper_trading",
     "examples/pumpswap_trading",
     "examples/bonk_sniper_trading",
     "examples/bonk_copy_trading",