Cleanup - `external_internal_function_hash_collision` (#3000) #389

Job	Run time
benchmark (solana-sdk, cargo +$rust_nightly bench -p solana-sdk)	1m 24s
benchmark (solana-runtime, cargo +$rust_nightly bench -p solana-runtime)	1m 12s
benchmark (solana-gossip, cargo +$rust_nightly bench -p solana-gossip)	2m 57s
benchmark (solana-poh, cargo +$rust_nightly bench -p solana-poh)	1m 25s
benchmark (solana-core, cargo +$rust_nightly bench -p solana-core)	5m 43s
benchmark (sbf, make -C programs/sbf all, cargo +$rust_nightly bench --manifest-path programs/sbf...	1m 34s
benchmark (solana-accounts-db, cargo +$rust_nightly bench -p solana-accounts-db --bench accounts_...	13m 35s
	27m 50s

Provide feedback