Delete data file

customers/val.csv

@@ -1,16 +0,0 @@
-,customer_id,name,age
-26,27,Customer_27,58
-53,54,Customer_54,43
-70,71,Customer_71,22
-15,16,Customer_16,49
-45,46,Customer_46,57
-88,89,Customer_89,73
-40,41,Customer_41,79
-12,13,Customer_13,69
-72,73,Customer_73,79
-55,56,Customer_56,43
-80,81,Customer_81,27
-18,19,Customer_19,58
-90,91,Customer_91,23
-31,32,Customer_32,33
-22,23,Customer_23,53