refactor(astutils): remove redundant nil check in Walk
#2660
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From the Go docs: "For a nil slice, the number of iterations is 0." [1] Therefore, an additional nil check for before the loop is unnecessary. [1]: https://go.dev/ref/spec#For_range Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>
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From the Go docs:
Therefore, an additional nil check for before the loop is unnecessary. Example: https://go.dev/play/p/tMQ9JcUOMcI