tai64

cms: remove `pem` feature (#1563) #2184

Job	Run time
build (1.65.0, thumbv7em-none-eabi)	1m 4s
build (1.65.0, wasm32-unknown-unknown)	1m 2s
test (1.65.0)	1m 4s
build (stable, thumbv7em-none-eabi)	11s
test (stable)	9s
build (stable, wasm32-unknown-unknown)	13s
minimal-versions / minimal-versions	18s
	4m 1s

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