Revert of [compiler] Add relocatable pointer constants for wasm memory references.

src/compiler/instruction.h

Index: src/compiler/instruction.h
diff --git a/src/compiler/instruction.h b/src/compiler/instruction.h
index 6284ab503002a3cb50bb070ebe5ed65a87ca0d92..7f64dce978bd6bc9c2f6631c7f569ab37db7fe96 100644
--- a/src/compiler/instruction.h
+++ b/src/compiler/instruction.h
@@ -947,11 +947,8 @@
   explicit Constant(Handle<HeapObject> obj)
       : type_(kHeapObject), value_(bit_cast<intptr_t>(obj)) {}
   explicit Constant(RpoNumber rpo) : type_(kRpoNumber), value_(rpo.ToInt()) {}
-  explicit Constant(RelocatablePtrConstantInfo info);
 
   Type type() const { return type_; }
-
-  RelocInfo::Mode rmode() const { return rmode_; }
 
   int32_t ToInt32() const {
     DCHECK(type() == kInt32 || type() == kInt64);
@@ -995,7 +992,6 @@
  private:
   Type type_;
   int64_t value_;
-  RelocInfo::Mode rmode_;
 };