Drop riscv64-specific exclude_jni_libs element

This fulfills a "TODO: remove this when there is a riscv64 libcronet"
because with https://android-review.googlesource.com/2952606 there is
now a RISC-V64 libcronet. 

Bug: 276962315
Change-Id: Ia69657b13a35e47852bf2bc46b2aac95fcf46e0a

Tethering/apex/Android.bp

@@ -54,16 +54,6 @@ apex_defaults {
         "//external/cronet/third_party/boringssl:libcrypto",
         "//external/cronet/third_party/boringssl:libssl",
     ],
-    arch: {
-        riscv64: {
-            // TODO: remove this when there is a riscv64 libcronet
-            exclude_jni_libs: [
-                "cronet_aml_components_cronet_android_cronet",
-                "//external/cronet/third_party/boringssl:libcrypto",
-                "//external/cronet/third_party/boringssl:libssl",
-            ],
-        },
-    },
 }
 
 apex {