[WebAssembly] Object: Remove redundant method. NFC.

include/llvm/Object/Wasm.h

private:
   wasm::WasmFunction &getDefinedFunction(uint32_t Index);
   const wasm::WasmFunction &getDefinedFunction(uint32_t Index) const;
   wasm::WasmGlobal &getDefinedGlobal(uint32_t Index);
   wasm::WasmEvent &getDefinedEvent(uint32_t Index);
 
   const WasmSection &getWasmSection(DataRefImpl Ref) const;
   const wasm::WasmRelocation &getWasmRelocation(DataRefImpl Ref) const;
 
-  const uint8_t *getPtr(size_t Offset) const;
   Error parseSection(WasmSection &Sec);
   Error parseCustomSection(WasmSection &Sec, ReadContext &Ctx);
 
   // Standard section types
   Error parseTypeSection(ReadContext &Ctx);
   Error parseImportSection(ReadContext &Ctx);
   Error parseFunctionSection(ReadContext &Ctx);
   Error parseTableSection(ReadContext &Ctx);

lib/Object/WasmObjectFile.cpp

WasmObjectFile::WasmObjectFile(MemoryBufferRef Buffer, Error &Err)
   Header.Magic = getData().substr(0, 4);
   if (Header.Magic != StringRef("\0asm", 4)) {
     Err =
         make_error<StringError>("Bad magic number", object_error::parse_failed);
     return;
   }
 
   ReadContext Ctx;
-  Ctx.Start = getPtr(0);
+  Ctx.Start = reinterpret_cast<const uint8_t *>(getData().data());
   Ctx.Ptr = Ctx.Start + 4;
   Ctx.End = Ctx.Start + getData().size();
 
   if (Ctx.Ptr + 4 > Ctx.End) {
     Err = make_error<StringError>("Missing version number",
                                   object_error::parse_failed);
     return;
   }
while (Count--) {
     DataSegments.push_back(Segment);
   }
   if (Ctx.Ptr != Ctx.End)
     return make_error<GenericBinaryError>("Data section ended prematurely",
                                           object_error::parse_failed);
   return Error::success();
 }
 
-const uint8_t *WasmObjectFile::getPtr(size_t Offset) const {
-  return reinterpret_cast<const uint8_t *>(getData().data() + Offset);
-}
-
 const wasm::WasmObjectHeader &WasmObjectFile::getHeader() const {
   return Header;
 }
 
 void WasmObjectFile::moveSymbolNext(DataRefImpl &Symb) const { Symb.d.b++; }
 
 uint32_t WasmObjectFile::getSymbolFlags(DataRefImpl Symb) const {
   uint32_t Result = SymbolRef::SF_None;