Revert of [libfuzzer] proto-based renderer fuzzer draft

content/test/fuzzer/BUILD.gn

Index: content/test/fuzzer/BUILD.gn
diff --git a/content/test/fuzzer/BUILD.gn b/content/test/fuzzer/BUILD.gn
index e4459eda4d4b66911518de89ba37dc2cc1ed513e..4222577ca615d7b6ba2a162d78ff99c4e586a563 100644
--- a/content/test/fuzzer/BUILD.gn
+++ b/content/test/fuzzer/BUILD.gn
@@ -5,7 +5,6 @@
 # Fuzzers for content/ components.
 
 import("//testing/libfuzzer/fuzzer_test.gni")
-import("//third_party/protobuf/proto_library.gni")
 
 # Empty group for package discovery.
 group("fuzzer") {
@@ -68,22 +67,4 @@
     ]
     seed_corpus = "//content/test/data/fuzzer_corpus/clear_site_data/"
   }
-
-  fuzzer_test("renderer_proto_tree_fuzzer") {
-    sources = [
-      "renderer_proto_tree_fuzzer.cc",
-    ]
-    deps = [
-      ":fuzzer_support",
-      ":html_tree_proto",
-      "//third_party/libprotobuf-mutator",
-    ]
-  }
-
-  proto_library("html_tree_proto") {
-    sources = [
-      "html_tree.proto",
-    ]
-    testonly = true
-  }
 }