Clean up config.ml #7431

Job	Run time
build-compiler (ubuntu-24.04, ocaml-variants.5.3.0+options,ocaml-option-static, true, true, linux...	2m 15s
build-compiler (ubuntu-24.04-arm, ocaml-variants.5.3.0+options,ocaml-option-static, true, true, t...	4m 35s
build-compiler (macos-14, 5.3.0, true, darwin-arm64, aarch64-apple-darwin)	2m 49s
build-compiler (macos-13, 5.3.0, true, darwin-x64, x86_64-apple-darwin)	4m 58s
build-compiler (ubuntu-24.04, ocaml-variants.5.0.0+options,ocaml-option-static, linux-x64, x86_64...	2m 47s
build-compiler (ubuntu-24.04, ocaml-variants.4.14.2+options,ocaml-option-static, linux-x64, x86_6...	2m 26s
build-compiler (windows-latest, 5.3.0, true, win32-x64, x86_64-pc-windows-gnu)	4m 1s
build-compiler (ubuntu-24.04, ocaml-variants.5.2.1+options,ocaml-option-static, linux-x64, x86_64...	2m 28s
pkg-pr-new	47s
api-docs	8s
test-integration-rewatch (macos-14)	31s
test-integration-rewatch (macos-13)	45s
test-installation-pnpm (macos-14)	14s
test-installation-pnpm (macos-13)	24s
test-integration-rewatch (ubuntu-24.04-arm)	34s
test-integration-rewatch (windows-latest)	54s
test-integration-rewatch (ubuntu-24.04)	29s
test-installation-npm (macos-13)	25s
test-installation-npm (ubuntu-24.04-arm)	19s
test-installation-pnpm (windows-latest)	32s
test-installation-npm (macos-14)	17s
test-installation-npm (ubuntu-24.04)	17s
test-installation-pnpm (ubuntu-24.04-arm)	19s
test-installation-pnpm (ubuntu-24.04)	13s
test-installation-npm (windows-latest)	50s
publish	0s
	34m 17s

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