Fix: Remove superfluous output from check-gmp

Some superfluos print statements are removed from check-gmp.gmp.py
that were presumably added for in-development testing and accidentally
left in.

scripts/check-gmp.gmp.py

@@ -189,16 +189,13 @@ def is_old_report(self, last_scan_end, params_used):
             (self.host,),
         )
         db_entry = self.cursor.fetchone()
-        print(db_entry)
 
         logger.debug("%s %s", db_entry, last_scan_end)
 
         if not db_entry:
             return True
         else:
-            print(db_entry[0])
             old = parse_date(db_entry[0])
-            print(last_scan_end)
             new = parse_date(last_scan_end)
 
             logger.debug(
@@ -1142,8 +1139,6 @@ def parse_date(datestring, default_timezone=UTC):
     if not isinstance(datestring, str):
         raise ParseError(f"Expecting a string {datestring}")
 
-    print(datestring)
-
     match = ISO8601_REGEX.match(datestring)
     if not match:
         raise ParseError(f"Unable to parse date string {datestring}")