`load_all_models`を廃止する #1984

Job	Run time
actionlint	33s
validate-cargo-lock	32s
build-unix-cpp-example (macos-latest, osx-x64-cpu-cpp-shared)	4m 28s
build-unix-cpp-example (ubuntu-latest, linux-x64-cpu-cpp-shared)	2m 28s
c-header	1m 17s
rust-integration-test-strategy-matrix	3s
rust-lint	1m 46s
rust-unit-test	3m 16s
build-and-test-java-api (windows-latest)	6m 18s
build-and-test-java-api (macos-latest)	6m 20s
build-and-test-java-api (ubuntu-latest)	5m 5s
build-and-test-python-api (windows-latest)	5m 44s
build-and-test-python-api (macos-latest)	6m 13s
build-and-test-python-api (ubuntu-latest)	5m 4s
build-windows-cpp-example	5m 31s
shellcheck	17s
rust-integration-test (windows-2019, directml)	4m 22s
rust-integration-test (macos-11)	1m 42s
rust-integration-test (ubuntu-20.04)	2m 33s
	1h 3m 32s

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