Remove lib_experimental

It is just "lib" with much less headers.

PiperOrigin-RevId: 336701706
Change-Id: Id4772ad3f83471782eefe6866cecb083fe05d9ee

tensorflow/cc/BUILD

@@ -251,7 +251,6 @@ cc_library_with_android_deps(
     deps = [
         "//tensorflow/core:core_cpu",
         "//tensorflow/core:lib",
-        "//tensorflow/core:lib_experimental",
         "//tensorflow/core:protos_all_cc",
     ],
 )
@@ -266,7 +265,6 @@ tf_cc_test(
         "//tensorflow/core:core_cpu_internal",
         "//tensorflow/core:framework",
         "//tensorflow/core:lib",
-        "//tensorflow/core:lib_experimental",
         "//tensorflow/core:tensorflow",
         "//tensorflow/core:test",
         "//tensorflow/core:test_main",

tensorflow/core/BUILD

@@ -164,11 +164,6 @@ exports_files([
     "ops/ops.pbtxt",
 ])
 
-package_group(
-    name = "experimental_access",
-    packages = ["//tensorflow/core/common_runtime/..."],
-)
-
 # Authorized users go here.
 package_group(name = "friends")
 
@@ -369,22 +364,6 @@ cc_library(
     ],
 )
 
-# APIs defined in lib_experimental are for experimental usage and may be
-# subject to change. Its visibility is limited to selected packages.
-cc_library(
-    name = "lib_experimental",
-    hdrs = [
-        "//tensorflow/core/lib/core:legacy_lib_core_threadpool_options_header",
-    ],
-    visibility = [
-        ":experimental_access",
-        "//tensorflow/cc:__pkg__",
-    ],
-    deps = [
-        ":lib",
-    ],
-)
-
 alias(
     name = "feature_util",
     actual = "//tensorflow/core/example:feature_util",

tensorflow/core/common_runtime/BUILD

@@ -1739,7 +1739,6 @@ tf_cuda_library(
         "//tensorflow/core:framework_internal",
         "//tensorflow/core:graph",
         "//tensorflow/core:lib",
-        "//tensorflow/core:lib_experimental",
         "//tensorflow/core:lib_internal",
         "//tensorflow/core:protos_all_cc",
         "//tensorflow/core/debug:debug_graph_utils",

tensorflow/core/lib/core/BUILD

@@ -247,14 +247,6 @@ filegroup(
     visibility = ["//tensorflow/core:__pkg__"],
 )
 
-filegroup(
-    name = "legacy_lib_core_threadpool_options_header",
-    srcs = [
-        "threadpool_options.h",
-    ],
-    visibility = ["//tensorflow/core:__pkg__"],
-)
-
 filegroup(
     name = "legacy_lib_proto_parsing_headers",
     srcs = [
@@ -279,6 +271,7 @@ filegroup(
         "stringpiece.h",
         "threadpool.h",
         "threadpool_interface.h",
+        "threadpool_options.h",
     ],
     visibility = ["//tensorflow/core:__pkg__"],
 )