Remove the comma from SharePoint Item List Integer Number column

On you "Number" column select the drop down option "Column settings"

 

Then "Format this column"

Delete the JSON that is in the box and replace it with this:

{
"elmType": "div",
"attributes": {
"class": "=if(@currentField > 0,'', '')"
},
"children": [
{
"elmType": "span",
"style": {
"display": "inline-block"
}
},
{
"elmType": "span",
"txtContent": "@currentField"
}
]
}
 

And click save. All done :)