[clang][Interp][NFC] Remove Block::deref()

Summary: We already have Pointer::deref()

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Differential Revision: https://phabricator.intern.facebook.com/D60251633

Author: tbaederr

clang/lib/AST/Interp/Interp.h

@@ -1252,8 +1252,7 @@ bool GetGlobalUnchecked(InterpState &S, CodePtr OpPC, uint32_t I) {
   const Pointer &Ptr = S.P.getPtrGlobal(I);
   if (!Ptr.isInitialized())
     return false;
-  const Block *B = S.P.getGlobal(I);
-  S.Stk.push<T>(B->deref<T>());
+  S.Stk.push<T>(Ptr.deref<T>());
   return true;
 }
 

clang/lib/AST/Interp/InterpBlock.h

@@ -105,13 +105,6 @@ class Block final {
     return reinterpret_cast<const std::byte *>(this) + sizeof(Block);
   }
 
-  /// Returns a view over the data.
-  template <typename T>
-  T &deref() { return *reinterpret_cast<T *>(data()); }
-  template <typename T> const T &deref() const {
-    return *reinterpret_cast<const T *>(data());
-  }
-
   /// Invokes the constructor.
   void invokeCtor() {
     std::memset(rawData(), 0, Desc->getAllocSize());