refactoring: removed unnecessary comments

src/convert_g_to_mg.c

@@ -2,5 +2,5 @@
 #include "convert_g_to_mg.h"
 
 double g_to_mg(double grams) {
-    return grams * 1000.0; // 1 gram = 1000 milligrams
+    return grams * 1000.0;
 }