remove executor.h 8/N (#193)

Summary:
Pull Request resolved: #193

no useage so just replacing includes

Reviewed By: cccclai

Differential Revision: D48879753

fbshipit-source-id: 604bf5e4cc0992c52f2501f6dec7dcdd9e9a4211

Author: JacobSzwejbka

exir/backend/test/demos/rpc/ExecutorBackend.cpp

@@ -17,7 +17,8 @@
 #include <executorch/runtime/backend/backend_registry.h>
 #include <executorch/runtime/core/error.h>
 #include <executorch/runtime/core/evalue.h>
-#include <executorch/runtime/executor/executor.h>
+#include <executorch/runtime/executor/method.h>
+#include <executorch/runtime/executor/program.h>
 #include <executorch/util/util.h>
 
 namespace torch {

exir/backend/test/demos/rpc/targets.bzl

@@ -23,7 +23,7 @@ def define_common_targets():
         ],
         platforms = [ANDROID, CXX],
         deps = [
-            "//executorch/runtime/executor:executor",
+            "//executorch/runtime/executor:program",
             "//executorch/kernels/portable:generated_lib",
             "//executorch/runtime/backend:backend_registry",
             "//executorch/extension/data_loader:buffer_data_loader",