[NFCI][scudo] Remove unused variable 'MaxCount' (llvm#100201)

Fixes "error: unused variable 'MaxCount' [-Werror,-Wunused-variable]",
which is no longer used after
llvm#99409

compiler-rt/lib/scudo/standalone/secondary.h

@@ -332,7 +332,6 @@ template <typename Config> class MapAllocatorCache {
  bool retrieve(Options Options, uptr Size, uptr Alignment, uptr HeadersSize,
  LargeBlock::Header **H, bool *Zeroed) EXCLUDES(Mutex) {
  const uptr PageSize = getPageSizeCached();
- const u32 MaxCount = atomic_load_relaxed(&MaxEntriesCount);
  // 10% of the requested size proved to be the optimal choice for
  // retrieving cached blocks after testing several options.
  constexpr u32 FragmentedBytesDivisor = 10;
@@ -449,7 +448,6 @@ template <typename Config> class MapAllocatorCache {
  Quarantine[I].invalidate();
  }
  }
- const u32 MaxCount = atomic_load_relaxed(&MaxEntriesCount);
  for (u32 I = LRUHead; I != CachedBlock::InvalidEntry; I = Entries[I].Next) {
  Entries[I].MemMap.setMemoryPermission(Entries[I].CommitBase,
  Entries[I].CommitSize, 0);