Revert "Improve multiPV mode"

This reverts commit a8de07c.

src/search.cpp

@@ -341,7 +341,7 @@ void Thread::search() {
   bestValue = delta = alpha = -VALUE_INFINITE;
   beta = VALUE_INFINITE;
 
-  multiPV = Options["MultiPV"];
+  size_t multiPV = Options["MultiPV"];
 
   // Pick integer skill levels, but non-deterministically round up or down
   // such that the average integer skill corresponds to the input floating point one.
@@ -934,12 +934,6 @@ namespace {
           sync_cout << "info depth " << depth / ONE_PLY
                     << " currmove " << UCI::move(move, pos.is_chess960())
                     << " currmovenumber " << moveCount + thisThread->pvIdx << sync_endl;
-
-      // In MultiPV mode also skip moves which will be searched later as PV moves
-      if (rootNode && std::count(thisThread->rootMoves.begin() + thisThread->pvIdx + 1,
-                                 thisThread->rootMoves.begin() + thisThread->multiPV, move))
-          continue;
-
       if (PvNode)
           (ss+1)->pv = nullptr;
 

src/thread.h

@@ -59,7 +59,7 @@ class Thread {
 
   Pawns::Table pawnsTable;
   Material::Table materialTable;
-  size_t pvIdx, multiPV, pvLast, shuffleExts;
+  size_t pvIdx, pvLast, shuffleExts;
   int selDepth, nmpMinPly;
   Color nmpColor;
   std::atomic<uint64_t> nodes, tbHits, bestMoveChanges;