cronet: delete option to disable cronet in tm-mainline-prod

With the release cut of the July train and the recent automerger
cutover, tm-mainline-prod is now officially an abandoned branch.

This change deletes (most) infrastructure that was put in place to
disable cronet on tm-mainline-prod.

Test: builds
Change-Id: I078f2114b736a634f08d8f704c19beb2224ef645
diff --git a/Cronet/tests/cts/Android.bp b/Cronet/tests/cts/Android.bp
index 22eccf9..44b3364 100644
--- a/Cronet/tests/cts/Android.bp
+++ b/Cronet/tests/cts/Android.bp
@@ -18,38 +18,10 @@
     default_applicable_licenses: ["Android-Apache-2.0"],
 }
 
-// cronet_test_java_defaults can be used to specify a java_defaults target that
-// either enables or disables Cronet tests. This is used to disable Cronet
-// tests on tm-mainline-prod where the required APIs are not present.
-cronet_test_java_defaults = "CronetTestJavaDefaultsEnabled"
-// This is a placeholder comment to avoid merge conflicts
-// as cronet_test_java_defaults may have different values
-// depending on the branch
-
-java_defaults {
-    name: "CronetTestJavaDefaultsEnabled",
-    enabled: true,
-    // TODO(danstahr): move to unconditional static_libs once the T branch is abandoned
-    static_libs: [
-        "truth",
-    ],
-}
-
-java_defaults {
-    name: "CronetTestJavaDefaultsDisabled",
-    enabled: false,
-}
-
-java_defaults {
-    name: "CronetTestJavaDefaults",
-    defaults: [cronet_test_java_defaults],
-}
-
 android_library {
     name: "CtsNetHttpTestsLib",
     defaults: [
         "cts_defaults",
-        "CronetTestJavaDefaults",
     ],
     sdk_version: "test_current",
     min_sdk_version: "30",
@@ -61,10 +33,11 @@
         "androidx.test.ext.junit",
         "ctstestrunner-axt",
         "ctstestserver",
-        "junit",
         "hamcrest-library",
+        "junit",
         "kotlin-test",
         "mockito-target",
+        "truth",
     ],
     libs: [
         "android.test.base",
@@ -79,7 +52,6 @@
     name: "CtsNetHttpTestCases",
     defaults: [
         "cts_defaults",
-        "CronetTestJavaDefaults",
     ],
     sdk_version: "test_current",
     static_libs: ["CtsNetHttpTestsLib"],