Revert "Allow configuration of replay thread pools from CLI (#236)" #3

Job	Run time
cargo-test-sbf (token/program)	6m 46s
cargo-test-sbf (instruction-padding/program, token/program-2022, token/program-2022-test)	11m 51s
check	0s
cargo-test-sbf (associated-token-account/program, associated-token-account/program-test)	7m 50s
test	0s
cargo-test-sbf (token-upgrade/program)	6m 43s
cargo-test-sbf (feature-proposal/program)	6m 15s
cargo-test-sbf (governance/addin-mock/program, governance/program)	9m 55s
cargo-test-sbf (memo/program)	6m 20s
cargo-test-sbf (name-service/program)	8m 19s
cargo-test-sbf (stake-pool/program)	9m 41s
cargo-test-sbf (single-pool/program)	7m 30s
	1h 21m 10s

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