How to skip null images in Google Earth Engine?

I’ve called sentinel2 image collection but I don’t know how can I skip null images instead of filter.neq():

code link: https://code.earthengine.google.com/b762152c33e6eddca96c2006e62eed54

var s22 = ee.ImageCollection("COPERNICUS/S2")
.filterDate(start_date,end_date)
.filterBounds(table)
.filter(ee.Filter.lessThan('CLOUDY_PIXEL_PERCENTAGE',45))
.filter(ee.Filter.neq('PRODUCT_ID','S2A_MSIL1C_20180518T071621_N0206_R006_T39SUR_20180518T093201'));