Revert of Setting up an RTP input fuzzer for NetEq (patchset #2 id:20001 of https://codereview.webrtc.org/2315633002/ )

Reason for revert:
Broke all Chromium libFuzzer builds
https://bugs.chromium.org/p/chromium/issues/detail?id=645069

Original issue's description:
> Setting up an RTP input fuzzer for NetEq
>
> This CL introduces a new fuzzer target neteq_rtp_fuzzer that
> manipulates the RTP header fields before inserting the packets into
> NetEq. A few helper classes are also introduced.
>
> BUG=webrtc:5447
> NOTRY=True
>
> Committed: https://crrev.com/2d273f1e97cd5030ed1686f27ce1118291b66395
> Cr-Commit-Position: refs/heads/master@{#14103}

[email protected],[email protected]
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:5447

Review-Url: https://codereview.webrtc.org/2328483002
Cr-Commit-Position: refs/heads/master@{#14131}

Author: henrik.lundin

webrtc/modules/audio_coding/BUILD.gn

@@ -1110,8 +1110,6 @@ if (rtc_include_tests) {
       "neteq/tools/audio_sink.h",
       "neteq/tools/constant_pcm_packet_source.cc",
       "neteq/tools/constant_pcm_packet_source.h",
-      "neteq/tools/encode_neteq_input.cc",
-      "neteq/tools/encode_neteq_input.h",
       "neteq/tools/fake_decode_from_file.cc",
       "neteq/tools/fake_decode_from_file.h",
       "neteq/tools/input_audio_file.cc",

webrtc/modules/audio_coding/neteq/neteq.gypi

@@ -231,8 +231,6 @@
             'tools/audio_sink.cc',
             'tools/constant_pcm_packet_source.cc',
             'tools/constant_pcm_packet_source.h',
-            'tools/encode_neteq_input.cc',
-            'tools/encode_neteq_input.h',
             'tools/fake_decode_from_file.cc',
             'tools/fake_decode_from_file.h',
             'tools/input_audio_file.cc',

webrtc/modules/audio_coding/neteq/tools/encode_neteq_input.cc

@@ -65,9 +65,7 @@ class NetEqInput {
   // time).
   virtual void AdvanceOutputEvent() = 0;
 
-  // Returns true if the source has come to an end. An implementation must
-  // eventually return true from this method, or the test will end up in an
-  // infinite loop.
+  // Returns true if the source has come to an end.
   virtual bool ended() const = 0;
 
   // Returns the RTP header for the next packet, i.e., the packet that will be

webrtc/modules/audio_coding/neteq/tools/encode_neteq_input.h

@@ -184,19 +184,6 @@ webrtc_fuzzer_test("audio_decoder_opus_redundant_fuzzer") {
   ]
 }
 
-webrtc_fuzzer_test("neteq_rtp_fuzzer") {
-  sources = [
-    "neteq_rtp_fuzzer.cc",
-  ]
-  deps = [
-    "../../modules/audio_coding:neteq",
-    "../../modules/audio_coding:neteq_unittest_tools",
-    "../../modules/audio_coding:pcm16b",
-    "../../modules/rtp_rtcp",
-    "../../test:test_support",
-  ]
-}
-
 # TODO(katrielc) Enable in Chromium when CL 2022833002 lands.
 # Although the dependency on media compiles in standalone, it is
 # flagged by gn check, so breaks when rolled into Chromium.