Only manually and file by file - if at all. How easily depends largely on what exactly you want to remove.
If the snippet has a clear, audible period of silence at both ends, you can simply open the file in an audio editor such as Audacity, Ocenaudio etc., paying attention that you cut at zero crossings as to avoid audible clicks. Bring the ends of the truncated waveform together and save the new file.
If there's no clear silence, it gets difficult. This is because an audio waveform is a very complex thingy, just cutting at zero crossings is usually not enough. I've tried that myself often enough in the past; matching the audio without audible clicks and pops is well-nigh impossible.
If the "snippet" is an overlaid recorded watermark such as "produced by ACME" on top of a sample, there's no way without destroying the original audio.
There's really no use for this kind of tool even in professional audio production; unless maybe in movie post-processing which I'm not familiar with. Even if such automatable tool exists it's bound to be VERY expensive, considering that the professional toolsets for noise reduction etc. cost several thousands.