net/dns/resolver: remove closure allocation explanation
As of Go 1.18, the register ABI list includes arm64, amd64,
ppc64, and ppc64le. This is a large enough percentage of the
architectures that it's not worth explaining.
@@ -965,8 +965,6 @@ func TestAllocs(t *testing.T) {
}{
// Name lowercasing, response slice created by dns.NewBuilder,
// and closure allocation from go call.
- // (Closure allocation only happens when using new register ABI,
- // which is amd64 with Go 1.17, and probably more platforms later.)
{"forward", dnspacket("test1.ipn.dev.", dns.TypeA, noEdns), 3},
// 3 extra allocs in rdnsNameToIPv4 and one in marshalPTRRecord (dns.NewName).
{"reverse", dnspacket("4.3.2.1.in-addr.arpa.", dns.TypePTR, noEdns), 5},
