There is the opinion of Rabbi Shimeon, following which to bow nezirut Shimshon is nothing. Gemara said, no necessarily following this last  opinion, that Shimshon himself was not a Nazir because his status was dicted by an angel (for Shmueli, his pregnant mother did make a vow of nezirut following Tana kama on the last chapter)

> ר"ש אומר האומר נזיר שמשון לא אמר כלום שלא מצינו 
 שיצאת נזירות מפיו 

> ושמשון לאו נזיר הוה והכתיב (שופטים יג) כי נזיר אלהים יהיה הנער מן הבטן התם מלאך


The Rambam, as reported by @double AA, has an interesting peak, he follows the Stam mishna that there is nezirut Shimshon, not by hatpasa on Shimshon, but as a kabala of different prohibitions. (explained following the Magari Ben Lev there, quoted in kesef mishna and To. YT. mishna 1:2)