Deprecate hpack_table_size flag, remove dead code.

net/BUILD.gn

Index: net/BUILD.gn
diff --git a/net/BUILD.gn b/net/BUILD.gn
index 74953f2d4579a8e9bd63c268e1ce1bec4d213385..8c4009f16395a33d3d4d1a8e9becee9d7bfafd78 100644
--- a/net/BUILD.gn
+++ b/net/BUILD.gn
@@ -2699,38 +2699,6 @@ if (!is_ios && !is_android) {
     ]
   }
 
-  executable("hpack_fuzz_mutator") {
-    testonly = true
-    sources = [
-      "spdy/fuzzing/hpack_fuzz_mutator.cc",
-    ]
-
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
-    deps = [
-      ":net",
-      "//base",
-      "//build/config/sanitizers:deps",
-      "//build/win:default_exe_manifest",
-    ]
-  }
-
-  executable("hpack_fuzz_wrapper") {
-    testonly = true
-    sources = [
-      "spdy/fuzzing/hpack_fuzz_wrapper.cc",
-    ]
-
-    # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-    configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
-    deps = [
-      ":net",
-      "//base",
-      "//build/config/sanitizers:deps",
-      "//build/win:default_exe_manifest",
-    ]
-  }
-
   if (use_v8_in_net) {
     executable("net_watcher") {
       testonly = true