Why duplicate packages across Imports and Depends

[MichaelChirico]

XVector/DESCRIPTION

Lines 13 to 15 in c527085

	Depends: R (>= 4.0.0), methods, BiocGenerics (>= 0.37.0),
	S4Vectors (>= 0.27.12), IRanges (>= 2.43.8)
	Imports: methods, utils, stats, tools, BiocGenerics, S4Vectors, IRanges

This looks unusual to me -- Depends implies Imports, as I see it.

Is there a reason for this style that I'm unaware of?