Remove dependency on fp16 #2736

Job	Run time
build-and-test / cmake-linux-armhf	8m 18s
build-and-test / cmake-linux-riscv64	5m 33s
build-and-test / cmake-linux-aarch64	8m 34s
build-and-test / cmake-linux-riscv64-rvv	12m 57s
build-and-test / cmake-windows-arm64	4m 9s
build-and-test / cmake-windows-x64	5m 32s
build-and-test / bazel-linux-x86_64-clang-18	12m 55s
build-and-test / cmake-ios-arm64	5m 30s
build-and-test / cmake-android (arm64)	7m 25s
build-and-test / cmake-ios-x86_64	6m 15s
build-and-test / cmake-linux-x86_64	9m 23s
build-and-test / cmake-android (armv7)	6m 40s
build-and-test / cmake-macos-arm64	8m 24s
build-and-test / cmake-android (x86)	7m 50s
build-and-test / bazel-linux-aarch64	8m 26s
build-and-test / cmake-windows-x86	6m 41s
build-and-test / bazel-linux-x86_64-gcc-9	7m 31s
	2h 12m 3s

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