Revert "Ensure Proxy frames work with JVMTI stack frame functions"

Reason for revert: gcstress 1914-get-local-instance failures,
  object-inl.h:163] Check failed: GetClass<kVerifyNone>() != nullptr

Bug: 66903662

This reverts commit a03a9eeb9d1b2ebca17cc326f52c84a5abca6707.

Change-Id: I5c68616d61566dd4ade713c4dad5e462b76d9af7
diff --git a/openjdkjvmti/ti_stack.cc b/openjdkjvmti/ti_stack.cc
index e0c1399..d4cc42a 100644
--- a/openjdkjvmti/ti_stack.cc
+++ b/openjdkjvmti/ti_stack.cc
@@ -789,7 +789,7 @@
   }
 
   *method_ptr = art::jni::EncodeArtMethod(closure.method);
-  if (closure.method->IsNative() || closure.method->IsProxyMethod()) {
+  if (closure.method->IsNative()) {
     *location_ptr = -1;
   } else {
     if (closure.dex_pc == art::dex::kDexNoIndex) {