CMake: removed JavaScript-related code to build libssh2 and OpenSSL. #13

Job	Run time
WebAssembly	3m 22s
Windows Python wheels	21m 39s
Windows static library (Intel)	1m 42s
Linux Python wheels	20m 2s
Windows shared library (Intel)	2m 14s
macOS Python wheels (Intel)	12m 32s
macOS Python wheels (ARM)	9m 51s
Windows static library (ARM)	1m 31s
Windows shared library (ARM)	2m 18s
Linux static library (Intel)	26s
Linux shared library (Intel)	36s
Linux static library (ARM)	33s
Linux shared library (ARM)	50s
macOS static library (Intel)	54s
macOS shared library (Intel)	1m 9s
macOS static library (ARM)	33s
macOS shared library (ARM)	38s
	1h 20m 50s

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