Removed global average pooling from average-pooling-nhwc. #427

Job	Run time
build-and-test / cmake-linux-aarch64	1m 54s
build-and-test / cmake-linux-riscv64	2m 25s
build-and-test / cmake-linux-armhf	2m 37s
build-and-test / cmake-linux-riscv64-rvv	1m 45s
build-and-test / cmake-linux-x86_64	3m 1s
build-and-test / cmake-ios-arm64	6m 0s
build-and-test / cmake-android (arm64)	2m 1s
build-and-test / cmake-ios-x86_64	7m 20s
build-and-test / cmake-android (armv7)	1m 57s
build-and-test / cmake-macos-arm64	2m 19s
build-and-test / cmake-windows-arm64	3m 18s
build-and-test / cmake-android (x86)	1m 51s
build-and-test / cmake-windows-x64	3m 24s
build-and-test / cmake-windows-x86	2m 4s
build-and-test / bazel-linux-aarch64	2m 4s
build-and-test / bazel-linux-x86_64-clang-18	2m 4s
build-and-test / bazel-linux-x86_64-gcc-9	1m 35s
	47m 39s

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