Make it Unspecified

clippy_lints/src/no_effect.rs

@@ -121,7 +121,7 @@ fn check_no_effect(cx: &LateContext<'_>, stmt: &Stmt<'_>) -> bool {
                                     stmt.span.shrink_to_lo(),
                                     "did you mean to return it?",
                                     "return ",
-                                    Applicability::MaybeIncorrect,
+                                    Applicability::Unspecified,
                                 );
                             }
                         }