T2 cleanup

Summary: Some cleanup from changes for T2 compressed pointer.

Reviewed By: haowu14

Differential Revision: D64537349

fbshipit-source-id: 5a53fabc81d62cef3fdc61909f5dcc4932b267b1

Author: Pranav Bhandari

cachelib/allocator/memory/CompressedPtr.h

@@ -70,11 +70,6 @@ class CACHELIB_PACKED_ATTR CompressedPtr4B {
     return ptr_ == ptr.ptr_;
   }
   bool operator!=(const PtrType ptr) const noexcept { return !(ptr == ptr_); }
-  // If the allocSize is smaller than this, then pointer compression is not
-  // going to work.
-  // static constexpr uint32_t getMinAllocSize() noexcept {
-  //   return static_cast<uint32_t>(1) << (Slab::kMinAllocPower);
-  // }
 
   // maximum addressable memory for pointer compression to work.
   static constexpr size_t getMaxAddressableSize() noexcept {

cachelib/allocator/memory/SlabAllocator.cpp

@@ -161,13 +161,6 @@ SlabAllocator::SlabAllocator(const serialization::SlabAllocatorObject& object,
         *object.minAllocSize()));
   }
 
-  if (getMinAllocSize() != *object.minAllocSize()) {
-    throw std::invalid_argument(folly::sformat(
-        "current min alloc size {} does not match the previous one {}",
-        getMinAllocSize(),
-        *object.minAllocSize()));
-  }
-
   XDCHECK(isRestorable());
 
   const size_t currSize = roundDownToSlabSize(memSize);