Generally speaking, you do not need to clean the DNA libraries if there are off-target products at 700 bp or higher. Amplicons that are within the 700 – 1500 bp range inefficiently cluster on the sequencer flow cell (Illumina sequencers). Therefore, additional cleanup steps are not necessary.
However, high-molecular-weight products need to be taken into consideration during library quantification.
Additional information can be found in the Tapestri Single-Cell DNA Sequencing V2 User Guide.