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

@@ -1380,15 +1380,13 @@ 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;
 
-                    assert(depth > 0);
+                // Reduce other moves if we have found at least one score improvement
-                    alpha = value;  // Update alpha! Always alpha < beta
+                if (depth > 2 && depth < 16 && !is_decisive(value))
-                }
+                    depth -= 2;
+
+                assert(depth > 0);
+                alpha = value;  // Update alpha! Always alpha < beta
             }
         }