Remove unrequired method #485

Job	Run time
rust_ci (macos-latest, stable)	51s
rust_ci (macos-latest, beta)	53s
rust_ci (macos-latest, nightly)	1m 25s
rust_ci (ubuntu-latest, stable)	48s
rust_ci (ubuntu-latest, beta)	52s
rust_ci (ubuntu-latest, nightly)	1m 26s
rust_ci (windows-latest, stable)	2m 42s
rust_ci (windows-latest, beta)	1m 28s
rust_ci (windows-latest, nightly)	3m 12s
	13m 37s

Provide feedback