Remove *_codegen_lib

Since filegroups are now correctly layered, build systems that needed these libs can now instantiate the filegroups as libs directly.
diff --git a/BUILD b/BUILD
index 142c78b..9acaba2 100644
--- a/BUILD
+++ b/BUILD
@@ -485,44 +485,6 @@
 
 
 cc_library(
-  name = "grpc_codegen_lib",
-  srcs = [
-  ],
-  hdrs = [
-    "include/grpc/impl/codegen/alloc.h",
-    "include/grpc/impl/codegen/atm.h",
-    "include/grpc/impl/codegen/atm_gcc_atomic.h",
-    "include/grpc/impl/codegen/atm_gcc_sync.h",
-    "include/grpc/impl/codegen/atm_win32.h",
-    "include/grpc/impl/codegen/byte_buffer.h",
-    "include/grpc/impl/codegen/compression_types.h",
-    "include/grpc/impl/codegen/connectivity_state.h",
-    "include/grpc/impl/codegen/grpc_types.h",
-    "include/grpc/impl/codegen/log.h",
-    "include/grpc/impl/codegen/port_platform.h",
-    "include/grpc/impl/codegen/propagation_bits.h",
-    "include/grpc/impl/codegen/slice.h",
-    "include/grpc/impl/codegen/slice_buffer.h",
-    "include/grpc/impl/codegen/status.h",
-    "include/grpc/impl/codegen/sync.h",
-    "include/grpc/impl/codegen/sync_generic.h",
-    "include/grpc/impl/codegen/sync_posix.h",
-    "include/grpc/impl/codegen/sync_win32.h",
-    "include/grpc/impl/codegen/time.h",
-  ],
-  includes = [
-    "include",
-    ".",
-  ],
-  deps = [
-    "//external:protobuf_compiler",
-    ":gpr",
-  ],
-)
-
-
-
-cc_library(
   name = "grpc_unsecure",
   srcs = [
     "src/core/ext/census/aggregation.h",
@@ -967,77 +929,6 @@
 
 
 cc_library(
-  name = "grpc++_codegen_lib",
-  srcs = [
-    "src/cpp/codegen/codegen_init.cc",
-  ],
-  hdrs = [
-    "include/grpc++/impl/codegen/async_stream.h",
-    "include/grpc++/impl/codegen/async_unary_call.h",
-    "include/grpc++/impl/codegen/call.h",
-    "include/grpc++/impl/codegen/call_hook.h",
-    "include/grpc++/impl/codegen/channel_interface.h",
-    "include/grpc++/impl/codegen/client_context.h",
-    "include/grpc++/impl/codegen/client_unary_call.h",
-    "include/grpc++/impl/codegen/completion_queue.h",
-    "include/grpc++/impl/codegen/completion_queue_tag.h",
-    "include/grpc++/impl/codegen/config.h",
-    "include/grpc++/impl/codegen/config_protobuf.h",
-    "include/grpc++/impl/codegen/core_codegen_interface.h",
-    "include/grpc++/impl/codegen/grpc_library.h",
-    "include/grpc++/impl/codegen/method_handler_impl.h",
-    "include/grpc++/impl/codegen/proto_utils.h",
-    "include/grpc++/impl/codegen/rpc_method.h",
-    "include/grpc++/impl/codegen/rpc_service_method.h",
-    "include/grpc++/impl/codegen/security/auth_context.h",
-    "include/grpc++/impl/codegen/serialization_traits.h",
-    "include/grpc++/impl/codegen/server_context.h",
-    "include/grpc++/impl/codegen/server_interface.h",
-    "include/grpc++/impl/codegen/service_type.h",
-    "include/grpc++/impl/codegen/status.h",
-    "include/grpc++/impl/codegen/status_code_enum.h",
-    "include/grpc++/impl/codegen/string_ref.h",
-    "include/grpc++/impl/codegen/stub_options.h",
-    "include/grpc++/impl/codegen/sync.h",
-    "include/grpc++/impl/codegen/sync_cxx11.h",
-    "include/grpc++/impl/codegen/sync_no_cxx11.h",
-    "include/grpc++/impl/codegen/sync_stream.h",
-    "include/grpc++/impl/codegen/time.h",
-    "include/grpc/impl/codegen/alloc.h",
-    "include/grpc/impl/codegen/atm.h",
-    "include/grpc/impl/codegen/atm_gcc_atomic.h",
-    "include/grpc/impl/codegen/atm_gcc_sync.h",
-    "include/grpc/impl/codegen/atm_win32.h",
-    "include/grpc/impl/codegen/byte_buffer.h",
-    "include/grpc/impl/codegen/compression_types.h",
-    "include/grpc/impl/codegen/connectivity_state.h",
-    "include/grpc/impl/codegen/grpc_types.h",
-    "include/grpc/impl/codegen/log.h",
-    "include/grpc/impl/codegen/port_platform.h",
-    "include/grpc/impl/codegen/propagation_bits.h",
-    "include/grpc/impl/codegen/slice.h",
-    "include/grpc/impl/codegen/slice_buffer.h",
-    "include/grpc/impl/codegen/status.h",
-    "include/grpc/impl/codegen/sync.h",
-    "include/grpc/impl/codegen/sync_generic.h",
-    "include/grpc/impl/codegen/sync_posix.h",
-    "include/grpc/impl/codegen/sync_win32.h",
-    "include/grpc/impl/codegen/time.h",
-  ],
-  includes = [
-    "include",
-    ".",
-  ],
-  deps = [
-    "//external:protobuf_clib",
-    ":gpr",
-    ":grpc",
-  ],
-)
-
-
-
-cc_library(
   name = "grpc++_unsecure",
   srcs = [
     "src/cpp/client/create_channel_internal.h",
@@ -1186,8 +1077,40 @@
     "src/compiler/objective_c_generator.cc",
     "src/compiler/python_generator.cc",
     "src/compiler/ruby_generator.cc",
+    "src/cpp/codegen/codegen_init.cc",
   ],
   hdrs = [
+    "include/grpc++/impl/codegen/async_stream.h",
+    "include/grpc++/impl/codegen/async_unary_call.h",
+    "include/grpc++/impl/codegen/call.h",
+    "include/grpc++/impl/codegen/call_hook.h",
+    "include/grpc++/impl/codegen/channel_interface.h",
+    "include/grpc++/impl/codegen/client_context.h",
+    "include/grpc++/impl/codegen/client_unary_call.h",
+    "include/grpc++/impl/codegen/completion_queue.h",
+    "include/grpc++/impl/codegen/completion_queue_tag.h",
+    "include/grpc++/impl/codegen/config.h",
+    "include/grpc++/impl/codegen/config_protobuf.h",
+    "include/grpc++/impl/codegen/core_codegen_interface.h",
+    "include/grpc++/impl/codegen/grpc_library.h",
+    "include/grpc++/impl/codegen/method_handler_impl.h",
+    "include/grpc++/impl/codegen/proto_utils.h",
+    "include/grpc++/impl/codegen/rpc_method.h",
+    "include/grpc++/impl/codegen/rpc_service_method.h",
+    "include/grpc++/impl/codegen/security/auth_context.h",
+    "include/grpc++/impl/codegen/serialization_traits.h",
+    "include/grpc++/impl/codegen/server_context.h",
+    "include/grpc++/impl/codegen/server_interface.h",
+    "include/grpc++/impl/codegen/service_type.h",
+    "include/grpc++/impl/codegen/status.h",
+    "include/grpc++/impl/codegen/status_code_enum.h",
+    "include/grpc++/impl/codegen/string_ref.h",
+    "include/grpc++/impl/codegen/stub_options.h",
+    "include/grpc++/impl/codegen/sync.h",
+    "include/grpc++/impl/codegen/sync_cxx11.h",
+    "include/grpc++/impl/codegen/sync_no_cxx11.h",
+    "include/grpc++/impl/codegen/sync_stream.h",
+    "include/grpc++/impl/codegen/time.h",
     "include/grpc/impl/codegen/alloc.h",
     "include/grpc/impl/codegen/atm.h",
     "include/grpc/impl/codegen/atm_gcc_atomic.h",
@@ -1209,7 +1132,7 @@
   ],
   deps = [
     "//external:protobuf_compiler",
-    ":grpc++_codegen_lib",
+    ":grpc",
   ],
 )