How can I remove tRNA, rRNA, snoRNA from the NGS miRNA sample using RFAM

Question

[khq5801]

I have downloaded all the files from FTP link of RFAM http://ftp.ebi.ac.uk/pub/databases/Rfam/CURRENT/fasta_files/ . Then, I merged all the files into a single file. I am just confused about how can I remove tRNA, rRNA, snoRNA, etc from my sample because I think the files that I downloaded from RFAM could have sequences belonging to other types of RNA also such as Genes, miRNA, CD-box, etc. Kindly provide your valuable suggestion or any reference on how to remove tRNA, rRNA, snoRNA from the sample.