[expected.void.general] Remove extraneous blank line (cplusplus#9038)

Author: Andreas-Krug

source/utilities.tex

@@ -9924,7 +9924,6 @@
   template<class U, class... Args>
     constexpr explicit expected(unexpect_t, initializer_list<U>, Args&&...);
 
-
   // \ref{expected.void.dtor}, destructor
   constexpr ~expected();