[wpiutil] Remove LEB128 (#7628)

This was only used for NT3.

wpiutil/src/main/native/cpp/leb128.cpp

@@ -1,118 +0,0 @@
-// Copyright (c) FIRST and other WPILib contributors.
-// Open Source Software; you can modify and/or share it under the terms of
-// the WPILib BSD license file in the root directory of this project.
-
-#include "wpi/leb128.h"
-
-#include "wpi/SpanExtras.h"
-#include "wpi/raw_istream.h"
-#include "wpi/raw_ostream.h"
-
-namespace wpi {
-
-uint64_t SizeUleb128(uint64_t val) {
-  size_t count = 0;
-  do {
-    val >>= 7;
-    ++count;
-  } while (val != 0);
-  return count;
-}
-
-uint64_t WriteUleb128(SmallVectorImpl<char>& dest, uint64_t val) {
-  size_t count = 0;
-
-  do {
-    uint8_t byte = val & 0x7f;
-    val >>= 7;
-
-    if (val != 0) {
-      byte |= 0x80;  // mark this byte to show that more bytes will follow
-    }
-
-    dest.push_back(byte);
-    count++;
-  } while (val != 0);
-
-  return count;
-}
-
-void WriteUleb128(raw_ostream& os, uint64_t val) {
-  do {
-    uint8_t byte = val & 0x7f;
-    val >>= 7;
-
-    if (val != 0) {
-      byte |= 0x80;  // mark this byte to show that more bytes will follow
-    }
-
-    os << byte;
-  } while (val != 0);
-}
-
-uint64_t ReadUleb128(const char* addr, uint64_t* ret) {
-  uint64_t result = 0;
-  int shift = 0;
-  size_t count = 0;
-
-  while (1) {
-    unsigned char byte = *reinterpret_cast<const unsigned char*>(addr);
-    addr++;
-    count++;
-
-    result |= (byte & 0x7fULL) << shift;
-    shift += 7;
-
-    if (!(byte & 0x80)) {
-      break;
-    }
-  }
-
-  *ret = result;
-
-  return count;
-}
-
-bool ReadUleb128(raw_istream& is, uint64_t* ret) {
-  uint64_t result = 0;
-  int shift = 0;
-
-  while (1) {
-    unsigned char byte;
-    is.read(reinterpret_cast<char*>(&byte), 1);
-    if (is.has_error()) {
-      return false;
-    }
-
-    result |= (byte & 0x7fULL) << shift;
-    shift += 7;
-
-    if (!(byte & 0x80)) {
-      break;
-    }
-  }
-
-  *ret = result;
-
-  return true;
-}
-
-std::optional<uint64_t> Uleb128Reader::ReadOne(std::span<const uint8_t>* in) {
-  while (!in->empty()) {
-    uint8_t byte = in->front();
-    *in = wpi::drop_front(*in);
-
-    m_result |= (byte & 0x7fULL) << m_shift;
-    m_shift += 7;
-
-    if (!(byte & 0x80)) {
-      uint64_t result = m_result;
-      m_result = 0;
-      m_shift = 0;
-      return result;
-    }
-  }
-  return std::nullopt;
-}
-
-}  // namespace wpi