Revert "Add new dependency library for vulkan tests" (#10273)

Reverts #10136

cc @manuelcandales @cbilgin

Author: SS-JIA

backends/vulkan/test/op_tests/targets.bzl

@@ -8,7 +8,6 @@ def define_test_targets(test_name, extra_deps = [], src_file = None, is_fbcode =
         "//third-party/googletest:gtest_main",
         "//executorch/backends/vulkan:vulkan_graph_runtime",
         runtime.external_dep_location("libtorch"),
-        runtime.external_dep_location("libtorch_cpu"),
     ] + extra_deps
 
     src_file_str = src_file if src_file else "{}.cpp".format(test_name)