Revert "Added test for RPCs over a flaky network"

Author: hcaseyal

test/cpp/end2end/BUILD

@@ -553,25 +553,6 @@ grpc_cc_test(
     ],
 )
 
-grpc_cc_test(
-    name = "flaky_network_test",
-    srcs = ["flaky_network_test.cc"],
-    external_deps = [
-        "gtest",
-    ],
-    tags = ["manual"],
-    deps = [
-        ":test_service_impl",
-        "//:gpr",
-        "//:grpc",
-        "//:grpc++",
-        "//src/proto/grpc/testing:echo_messages_proto",
-        "//src/proto/grpc/testing:echo_proto",
-        "//test/core/util:grpc_test_util",
-        "//test/cpp/util:test_util",
-    ],
-)
-
 grpc_cc_test(
     name = "shutdown_test",
     srcs = ["shutdown_test.cc"],