Revert "Reland "Version 2 "Refactoring DataContentDescription class"""

This reverts commit 37f2b43274a0d718de53a4cfcf02226356edcf6e.

Reason for revert: fuzzer failures

Original change's description:
> Reland "Version 2 "Refactoring DataContentDescription class""
>
> This is a reland of 14b2758726879d21671a21291dfed8fb4fd5c21c
>
> Original change's description:
> > Version 2 "Refactoring DataContentDescription class"
> >
> > (substantial changes since version 1)
> >
> > This CL splits the cricket::DataContentDescription class into
> > two classes: cricket::RtpDataContentDescription (used for RTP data)
> > and cricket::SctpDataContentDescription (used for SCTP only).
> >
> > SctpDataContentDescription no longer inherits from
> > MediaContentDescriptionImpl, and no longer contains "codecs".
> >
> > Due to usage of internal interfaces by consumers, shimming the old
> > DataContentDescription API is needed.
> >
> > A new cricket::DataContentDescription class is defined, which is
> > a shim over RtpDataContentDescription and SctpDataContentDescription.
> > It exposes as little functionality as possible, but supports the
> > concerned consumer's usage
> >
> > Design document:
> > https://docs.google.com/document/d/1H5LfQxJA2ikMWTQ8FZ3_GAmaXM7knfVQWiSz6ph8VQ0/edit#
> >
> > Version 1 reviewed-on: https://webrtc-review.googlesource.com/c/src/+/132700
> >
> > Bug: webrtc:10358
> > Change-Id: Icf95fb7308244d6f2ebfdb403aaffc544e358580
> > Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/133900
> > Commit-Queue: Harald Alvestrand <hta@webrtc.org>
> > Reviewed-by: Steve Anton <steveanton@webrtc.org>
> > Cr-Commit-Position: refs/heads/master@{#27853}
>
> Bug: webrtc:10358
> Change-Id: Iff45c4694167f0b31b34ff2167c1f4ffa650bcc4
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/135281
> Reviewed-by: Steve Anton <steveanton@webrtc.org>
> Commit-Queue: Harald Alvestrand <hta@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#27896}

TBR=steveanton@webrtc.org,kwiberg@webrtc.org,hbos@webrtc.org,hta@webrtc.org,shampson@webrtc.org

Change-Id: Ied6d9fb96aafe9c957f2658b34b5331b1f359b26
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: webrtc:10358
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/135986
Reviewed-by: Steve Anton <steveanton@webrtc.org>
Commit-Queue: Steve Anton <steveanton@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27917}

1 files changed, 0 insertions, 35 deletions

diff --git a/pc/media_protocol_names.h b/pc/media_protocol_names.h
deleted file mode 100644
index 88f1c4659d..0000000000
--- a/pc/media_protocol_names.h
+++ /dev/null
@@ -1,35 +0,0 @@
-/*
- *  Copyright 2019 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#ifndef PC_MEDIA_PROTOCOL_NAMES_H_
-#define PC_MEDIA_PROTOCOL_NAMES_H_
-
-#include <string>
-
-namespace cricket {
-
-// Names or name prefixes of protocols as defined by SDP specifications.
-extern const char kMediaProtocolRtpPrefix[];
-extern const char kMediaProtocolSctp[];
-extern const char kMediaProtocolDtlsSctp[];
-extern const char kMediaProtocolUdpDtlsSctp[];
-extern const char kMediaProtocolTcpDtlsSctp[];
-
-bool IsDtlsSctp(const std::string& protocol);
-bool IsPlainSctp(const std::string& protocol);
-
-// Returns true if the given media section protocol indicates use of RTP.
-bool IsRtpProtocol(const std::string& protocol);
-// Returns true if the given media section protocol indicates use of SCTP.
-bool IsSctpProtocol(const std::string& protocol);
-
-}  // namespace cricket
-
-#endif  // PC_MEDIA_PROTOCOL_NAMES_H_