Revert "Bundle Cronet's boringssl"

This reverts commit 2cd4ac872558c6248e8c641eb263547445ca0dec.

Reason for revert: b/273575026

Change-Id: I5b9886465b8a0f71af469d303a39f670a9b0cb68
diff --git a/Cronet/tests/mts/Android.bp b/Cronet/tests/mts/Android.bp
index ac71653..03d163c 100644
--- a/Cronet/tests/mts/Android.bp
+++ b/Cronet/tests/mts/Android.bp
@@ -19,7 +19,7 @@
 
 android_library {
     name: "NetHttpTestsLibPreJarJar",
-    srcs: ["//external/cronet:cronet_aml_javatests_sources"],
+    srcs: [":cronet_aml_javatests_sources"],
     sdk_version: "test_current",
     min_sdk_version: "30",
     static_libs: [