Remove unused static function in operator-utils.c to silence a warning. #66

Job	Run time
build-and-test / cmake-linux-aarch64	4m 13s
build-and-test / cmake-linux-armhf	5m 9s
build-and-test / cmake-linux-local	4m 19s
build-and-test / cmake-linux-riscv64	2m 39s
build-and-test / cmake-linux-riscv64-rvv	2m 34s
build-and-test / cmake-macos-arm64	2m 59s
build-and-test / cmake-windows-arm64	5m 19s
build-and-test / cmake-windows-x64	6m 28s
build-and-test / cmake-windows-x86	8m 25s
build-and-test / bazel-linux-aarch64	2m 38s
build-and-test / bazel-linux-x86_64	1m 58s
build-and-test / bazel-linux-x86_64-gcc-9	1m 10s
build-and-test / cmake-android (build-android-arm64.sh)	10m 50s
build-and-test / cmake-ios-arm64	6m 23s
build-and-test / cmake-android (build-android-armv7.sh)	10m 12s
build-and-test / cmake-ios-x86_64	7m 25s
build-and-test / cmake-android (build-android-x86.sh)	11m 46s
	1h 34m 27s

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