Revert "Allow obfuscating D8/R8 boundary in R8 partial"

This reverts commit d3e54cce144a12e208018f79298b24769d14e600.

Reason for revert: Test failure

Change-Id: I4676c5b536f06544903bb765467fb5cf210a2bbd
diff --git a/src/main/java/com/android/tools/r8/shaking/RootSetUtils.java b/src/main/java/com/android/tools/r8/shaking/RootSetUtils.java
index 46399ea..c1befbf 100644
--- a/src/main/java/com/android/tools/r8/shaking/RootSetUtils.java
+++ b/src/main/java/com/android/tools/r8/shaking/RootSetUtils.java
@@ -232,7 +232,7 @@
           new R8PartialUseCollector(appView) {
 
             private final ProguardKeepRuleModifiers modifiers =
-                ProguardKeepRuleModifiers.builder().setAllowsObfuscation(true).build();
+                ProguardKeepRuleModifiers.builder().build();
             // TODO(b/390576160): Add a test that this works when using -whyareyoukeeping.
             private final ReferencedFromD8InR8PartialFakeProguardRule keepRule =
                 new ReferencedFromD8InR8PartialFakeProguardRule();
diff --git a/src/test/java/com/android/tools/r8/partial/PartialCompilationKeepAllowObfuscationBoundaryTest.java b/src/test/java/com/android/tools/r8/partial/PartialCompilationKeepAllowObfuscationBoundaryTest.java
deleted file mode 100644
index 30bafec..0000000
--- a/src/test/java/com/android/tools/r8/partial/PartialCompilationKeepAllowObfuscationBoundaryTest.java
+++ /dev/null
@@ -1,65 +0,0 @@
-// Copyright (c) 2025, the R8 project authors. Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-package com.android.tools.r8.partial;
-
-import static com.android.tools.r8.utils.codeinspector.Matchers.isPresentAndRenamed;
-import static org.hamcrest.MatcherAssert.assertThat;
-
-import com.android.tools.r8.TestBase;
-import com.android.tools.r8.TestParameters;
-import com.android.tools.r8.TestParametersCollection;
-import com.android.tools.r8.utils.codeinspector.ClassSubject;
-import com.android.tools.r8.utils.codeinspector.MethodSubject;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.junit.runners.Parameterized;
-import org.junit.runners.Parameterized.Parameter;
-import org.junit.runners.Parameterized.Parameters;
-
-@RunWith(Parameterized.class)
-public class PartialCompilationKeepAllowObfuscationBoundaryTest extends TestBase {
-
-  @Parameter(0)
-  public TestParameters parameters;
-
-  @Parameters(name = "{0}")
-  public static TestParametersCollection data() {
-    return getTestParameters().withAllRuntimesAndApiLevels().build();
-  }
-
-  @Test
-  public void test() throws Exception {
-    parameters.assumeR8PartialTestParameters();
-    testForR8Partial(parameters.getBackend())
-        .addR8IncludedClasses(IncludedClass.class)
-        .addR8ExcludedClasses(Main.class)
-        .setMinApi(parameters)
-        .compile()
-        .inspect(
-            inspector -> {
-              ClassSubject includedClassSubject = inspector.clazz(IncludedClass.class);
-              assertThat(includedClassSubject, isPresentAndRenamed());
-
-              MethodSubject fooMethodSubject =
-                  includedClassSubject.uniqueMethodWithOriginalName("foo");
-              assertThat(fooMethodSubject, isPresentAndRenamed());
-            })
-        .run(parameters.getRuntime(), Main.class)
-        .assertSuccessWithOutputLines("Hello, world!");
-  }
-
-  static class Main {
-
-    public static void main(String[] args) {
-      IncludedClass.foo();
-    }
-  }
-
-  static class IncludedClass {
-
-    static void foo() {
-      System.out.println("Hello, world!");
-    }
-  }
-}