chore: remove C-Thread-Pool/example.c #351

Job	Run time
prepare	7s
build (php-8-2-alpine, linux/amd64)	7m 50s
build (php-8-2-alpine, linux/386)	5m 28s
build (php-8-2-alpine, linux/arm/v6)	28m 5s
build (php-8-2-alpine, linux/arm/v7)	21m 46s
build (php-8-2-alpine, linux/arm64)	23m 3s
build (php-8-2-bookworm, linux/amd64)	6m 59s
build (php-8-2-bookworm, linux/386)	6m 47s
build (php-8-2-bookworm, linux/arm/v6)	23m 25s
build (php-8-2-bookworm, linux/arm/v7)	22m 36s
build (php-8-2-bookworm, linux/arm64)	19m 33s
build (php-8-3-0RC2-alpine, linux/amd64)	8m 1s
build (php-8-3-0RC2-alpine, linux/386)	5m 31s
build (php-8-3-0RC2-alpine, linux/arm/v6)	29m 24s
build (php-8-3-0RC2-alpine, linux/arm/v7)	21m 45s
build (php-8-3-0RC2-alpine, linux/arm64)	24m 43s
build (php-8-3-0RC2-bookworm, linux/amd64)	7m 39s
build (php-8-3-0RC2-bookworm, linux/386)	5m 23s
build (php-8-3-0RC2-bookworm, linux/arm/v6)	25m 5s
build (php-8-3-0RC2-bookworm, linux/arm/v7)	23m 7s
build (php-8-3-0RC2-bookworm, linux/arm64)	27m 35s
push	0s
	5h 43m 52s

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