Remove RTC_DISALLOW_COPY_AND_ASSIGN from rtc_base/

Bug: webrtc:13555, webrtc:13082
Change-Id: I406b7f04497562866ea3329e97c5adc96e927b6f
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/245680
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Artem Titov <titovartem@webrtc.org>
Commit-Queue: (Daniel.L) Byoungchan Lee <daniel.l@hpcnt.com>
Cr-Commit-Position: refs/heads/main@{#35691}
diff --git a/rtc_base/bit_buffer.h b/rtc_base/bit_buffer.h
index 5375550..b4991bc 100644
--- a/rtc_base/bit_buffer.h
+++ b/rtc_base/bit_buffer.h
@@ -14,8 +14,6 @@
 #include <stddef.h>  // For size_t.
 #include <stdint.h>  // For integer types.
 
-#include "rtc_base/constructor_magic.h"
-
 namespace rtc {
 
 // A BitBuffer API for write operations. Supports symmetric write APIs to the
@@ -27,6 +25,9 @@
   // Constructs a bit buffer for the writable buffer of `bytes`.
   BitBufferWriter(uint8_t* bytes, size_t byte_count);
 
+  BitBufferWriter(const BitBufferWriter&) = delete;
+  BitBufferWriter& operator=(const BitBufferWriter&) = delete;
+
   // Gets the current offset, in bytes/bits, from the start of the buffer. The
   // bit offset is the offset into the current byte, in the range [0,7].
   void GetCurrentOffset(size_t* out_byte_offset, size_t* out_bit_offset);
@@ -80,8 +81,6 @@
   size_t byte_offset_;
   // The current offset, in bits, into the current byte.
   size_t bit_offset_;
-
-  RTC_DISALLOW_COPY_AND_ASSIGN(BitBufferWriter);
 };
 
 }  // namespace rtc