remove non-functional else

since we break out of the loop in the other branch

closes https://github.com/official-stockfish/Stockfish/pull/6116

no functional change

src/search.cpp

@@ -1380,8 +1380,7 @@ moves_loop:  // When in check, search starts here
                     assert(value >= beta);  // Fail high
                     break;
                 }
-                else
-                {
+
                 // Reduce other moves if we have found at least one score improvement
                 if (depth > 2 && depth < 16 && !is_decisive(value))
                     depth -= 2;
@@ -1390,7 +1389,6 @@ moves_loop:  // When in check, search starts here
                 alpha = value;  // Update alpha! Always alpha < beta
             }
         }
-        }
 
         // If the move is worse than some previously searched move,
         // remember it, to update its stats later.