Fix compilation and remove nphysics mentions #42

Job	Run time
all-features-native (salva2d)	6m 21s
build-native (salva2d, default)	24s
build-wasm (salva2d)	51s
check-fmt	7s
build-native (salva2d, parallel)	28s
build-wasm (salva3d)	47s
all-features-native (salva3d)	6m 11s
build-native (salva2d, sampling)	1m 9s
examples-native (examples2d, default)	7m 59s
test-native (salva2d)	29s
build-native (salva2d, parry)	35s
examples-native (examples2d, parallel)	7m 53s
examples-native (examples3d, default)	7m 42s
build-native (salva2d, rapier)	52s
test-native (salva3d)	32s
examples-native (examples3d, parallel)	8m 2s
build-native (salva2d, rapier-testbed)	5m 59s
build-native (salva3d, default)	26s
build-native (salva3d, parallel)	33s
build-native (salva3d, sampling)	1m 19s
build-native (salva3d, parry)	1m 11s
build-native (salva3d, rapier)	50s
build-native (salva3d, rapier-testbed)	6m 33s
	1h 7m 13s

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