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diff --git a/externals/oboe/apps/fxlab/app/src/main/cpp/tests/DelayLineEffectTest.h b/externals/oboe/apps/fxlab/app/src/main/cpp/tests/DelayLineEffectTest.h
deleted file mode 100644
index de9c15a45e..0000000000
--- a/externals/oboe/apps/fxlab/app/src/main/cpp/tests/DelayLineEffectTest.h
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- * Copyright 2019 Google LLC
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef ANDROID_FXLAB_DELAYLINEEFFECTTEST_H
-#define ANDROID_FXLAB_DELAYLINEEFFECTTEST_H
-
-
-#include <gtest/gtest.h>
-
-#include "../effects/DelayLineEffect.h"
-
-
-namespace {
- TEST(DelayLineEffectTest, SingleFeedForwardTest) {
- DelayLineEffect<float*> e1 {0, 1, 0, 1, 0, [](){return 0;}};
- std::array<float, 5> inputData {1, 0, 0.5, 0.25, 0};
- for (int i = 0; i < 5; i++){
- e1(inputData[i]);
- }
- EXPECT_EQ(inputData[0], 0);
- EXPECT_EQ(inputData[1], 1);
- EXPECT_EQ(inputData[2], 0);
- EXPECT_EQ(inputData[3], 0.5);
- EXPECT_EQ(inputData[4], 0.25);
- }
- TEST(DelayLineEffectTest, FFandBlendTest) {
- DelayLineEffect<float*> e1 {1, 1, 0, 1, 0, [](){return 0;}};
- std::array<float, 5> inputData {1, 0, 0.5, 0.25, 0};
- for (int i = 0; i < 5; i++) {
- e1(inputData[i]);
- }
- EXPECT_EQ(inputData[0], 1);
- EXPECT_EQ(inputData[1], 1);
- EXPECT_EQ(inputData[2], 0.5);
- EXPECT_EQ(inputData[3], 0.75);
- EXPECT_EQ(inputData[4], 0.25);
- }
-}
-#endif //ANDROID_FXLAB_DELAYLINEEFFECTTEST_H