Simplelize framework/CMakeLists.txt (#2803)

* generic.cmake can propogate dependencies through libraries. It is no
  need to specific all dependencies.

paddle/framework/CMakeLists.txt

@@ -18,4 +18,4 @@ add_custom_target(framework_py_proto_init ALL COMMAND ${CMAKE_COMMAND} -E touch
 add_dependencies(framework_py_proto framework_py_proto_init)
 
 proto_library(net_proto SRCS net_proto.proto DEPS op_proto)
-cc_library(net SRCS net.cc DEPS net_proto attr_type op_proto)
+cc_library(net SRCS net.cc DEPS net_proto)