[memprof] Fix builds under EXPENSIVE_CHECKS

memprof::Version1 has been removed, so the whole block of code is
dead.

llvm/lib/ProfileData/InstrProfReader.cpp

@@ -1345,18 +1345,6 @@ Error IndexedMemProfReader::deserialize(const unsigned char *Start,
     break;
   }
 
-#ifdef EXPENSIVE_CHECKS
-  // Go through all the records and verify that CSId has been correctly
-  // populated.  Do this only under EXPENSIVE_CHECKS.  Otherwise, we
-  // would defeat the purpose of OnDiskIterableChainedHashTable.
-  // Note that we can compare CSId against actual call stacks only for
-  // Version0 and Version1 because IndexedAllocationInfo::CallStack and
-  // IndexedMemProfRecord::CallSites are not populated in Version2.
-  if (Version <= memprof::Version1)
-    for (const auto &Record : MemProfRecordTable->data())
-      verifyIndexedMemProfRecord(Record);
-#endif
-
   return Error::success();
 }