Revert "Work around preopt causing test failure."

This is no longer needed after http://r.android.com/861802
(build/soong commit dc2da916fb1966fe0fb7a559542aa076ba29898c).

This reverts commit d8afb67d6eb84091e8565d1313ae33e6a33c8413.

Test: libcore.java.nio.file.FileSystemsTest
Test: libcore.java.lang.reflect.ParameterTest
Bug: 121317615
Change-Id: I572a0f7d298c3c78f7e7cda125cf85f518f1de3f
diff --git a/JavaLibrary.bp b/JavaLibrary.bp
index 6a9f5b5..e4639a2 100644
--- a/JavaLibrary.bp
+++ b/JavaLibrary.bp
@@ -425,9 +425,6 @@
 java_library {
     name: "filesystemstest",
     compile_dex: true,
-    dex_preopt: {
-        enabled: false,
-    },
     srcs: ["luni/src/test/filesystems/src/**/*.java"],
     java_resource_dirs: ["luni/src/test/filesystems/resources"],
     no_framework_libs: true,
@@ -441,9 +438,6 @@
 java_library {
     name: "parameter-metadata-test",
     compile_dex: true,
-    dex_preopt: {
-        enabled: false,
-    },
     srcs: ["luni/src/test/parameter_metadata/src/**/*.java"],
     no_framework_libs: true,
     javacflags: ["-parameters"],