perf: ZTS: remove obsolete realpath access check#22721
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Was benchmarking Symfony demo and figured out that ZTS builds had a much larger performance penalty in dev mode than in prod mode, with a lot of time spent in AssetMapper calling
realpath(). Traced it down to this.@iliaal 29e829fdcf8 was the commit introducing it. I don't think it's required anymore, the
virtual_realpathresolver itself fails for non-existent paths nowadays, just like NTS.