This symbol is shown in word processors (when showing special characters is activated) to make end-of-lines visible. The line endings are necessary for the RECFM=V in SAS (used when reading CSV files) to work. You do not need to remove them, as the termination strings are automatically used to identify the text lines.
BIG HINT:
do NOT use word processors or spreadsheet calculators to view CSV files you want to import into SAS. Always use a proper text editor suited for programming, like Notepad++.