Created by: pangyoki

PR types

Others

PR changes

APIs

Describe

In the implementation of Paddle 2.0 directory migration（PR #25898）, we both import the alias name and original name for alias APIs. For example, in paddle/_init_.py

from .fluid.dygraph.base import enable_dygraph  #DEFINE_ALIAS
from .fluid.dygraph.base import disable_dygraph  #DEFINE_ALIAS
from .fluid.dygraph.base import enable_dygraph as disable_static  #DEFINE_ALIAS
from .fluid.dygraph.base import disable_dygraph as enable_static  #DEFINE_ALIAS

Importing original name is unnecessary, however, the algorithm used to print all the specifications of APIs in print_signatures.py use the original name. If we don't import original name, CI can't pass. After solving the problem of print_signatures.py in PR #26143, we can remove the unnecessary original name. This PR is used to remove the original name for alias APIs.