refactoring: removed unnecessary comments

src/convert_kg_to_ton.c

@@ -2,5 +2,5 @@
 #include "convert_kg_to_ton.h"
 
 double kg_to_tons(double kilograms) {
-    return kilograms / 1000.0; // 1 ton = 1000 kilograms
+    return kilograms / 1000.0;
 }