`ZHeap::fixup_partial_loads` was removed in JDK-8224675, but there are still 3 occurrences in the code base.

## 1. `zHeap.hpp`

```
  void fixup_partial_loads();
```

## 2. `zArguments.cpp`

```
  // Verification before heap iteration not (yet) supported, for the
  // same reason we need fixup_partial_loads
  FLAG_SET_DEFAULT(VerifyBeforeIteration, false);
```

## 3. `zArguments.cpp`

```
  // Verification of stacks not (yet) supported, for the same reason
  // we need fixup_partial_loads
  DEBUG_ONLY(FLAG_SET_DEFAULT(VerifyStack, false));
```