eliuds-eggs: Reword exercise restrictions

Author: tasxatzial

exercises/eliuds-eggs/instructions.md

@@ -4,5 +4,5 @@ Your task is to count the number of 1 bits in the binary representation of a num
 
 ## Restrictions
 
-Keep your hands off that bit-count functionality provided by your standard library!
-Solve this one yourself using other basic tools instead.
+Avoid using any library functions that count the number of bits in a number.
+Instead, try solving this yourself using more basic tools.