Clarify that no dead code analysis is needed

specification.md

@@ -356,6 +356,7 @@ As the parser only does syntactic checking, additional semantic checks are imple
 - Checking for calls to unknown functions
 - Checking for presence of `main` and correct signature
 - Checking that all execution paths of a non-void function return a value
+    - You may assume that there is no dead code
 - Type checking (remember, neither implicit nor explicit type conversions)
     - Includes checking operations on arrays (including array size)
     - Includes checking arguments and return types for call expressions