remove uses of linkname

[3052]

plenc/plenccodec/unsafetricks.go

Lines 20 to 34 in 9ec99c5

	//go:linkname typedslicecopy reflect.typedslicecopy
	//go:noescape
	func typedslicecopy(elemType unsafe.Pointer, dst, src sliceHeader) int
	//go:linkname typedmemmove runtime.typedmemmove
	//go:noescape
	func typedmemmove(elemType unsafe.Pointer, dst, src unsafe.Pointer)
	//go:linkname typedmemclr reflect.typedmemclr
	//go:noescape
	func typedmemclr(elemType unsafe.Pointer, v unsafe.Pointer)
	//go:linkname mapassign runtime.mapassign
	//go:noescape
	func mapassign(typ unsafe.Pointer, hmap unsafe.Pointer, key unsafe.Pointer) (val unsafe.Pointer)

this is explicitly an anti pattern and discouraged by the Go team

golang/go#67401

[philpearl]

Love me a good anti-pattern!