Remove original name for alias APIs (#26195)

* fixed static module

* solve conflict

* remove original name for alias API

python/paddle/__init__.py

@@ -210,8 +210,6 @@ from .framework import BackwardStrategy  #DEFINE_ALIAS
 from .framework import to_variable  #DEFINE_ALIAS
 from .framework import grad  #DEFINE_ALIAS
 from .framework import no_grad  #DEFINE_ALIAS
-from .framework import save_dygraph  #DEFINE_ALIAS
-from .framework import load_dygraph  #DEFINE_ALIAS
 from .framework import save  #DEFINE_ALIAS
 from .framework import load  #DEFINE_ALIAS
 from .framework import prepare_context  #DEFINE_ALIAS
@@ -238,8 +236,6 @@ from .fluid.data import data
 
 from . import incubate
 from .incubate import hapi
-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
 from .fluid.framework import in_dygraph_mode as in_dynamic_mode  #DEFINE_ALIAS

python/paddle/framework/__init__.py

@@ -43,8 +43,6 @@ from paddle.fluid import core  #DEFINE_ALIAS
 from ..fluid.dygraph.base import no_grad  #DEFINE_ALIAS
 from ..fluid.dygraph.base import to_variable  #DEFINE_ALIAS
 from ..fluid.dygraph.base import grad  #DEFINE_ALIAS
-from ..fluid.dygraph.checkpoint import load_dygraph  #DEFINE_ALIAS
-from ..fluid.dygraph.checkpoint import save_dygraph  #DEFINE_ALIAS
 from ..fluid.dygraph.checkpoint import load_dygraph as load  #DEFINE_ALIAS
 from ..fluid.dygraph.checkpoint import save_dygraph as save  #DEFINE_ALIAS
 from ..fluid.dygraph.parallel import prepare_context  #DEFINE_ALIAS

python/paddle/jit/__init__.py

@@ -16,7 +16,6 @@ from ..fluid.dygraph.jit import save  #DEFINE_ALIAS
 from ..fluid.dygraph.jit import load  #DEFINE_ALIAS
 from ..fluid.dygraph.jit import SaveLoadConfig  #DEFINE_ALIAS
 from ..fluid.dygraph.jit import TracedLayer  #DEFINE_ALIAS
-from ..fluid.dygraph.jit import declarative as __impl__  #DEFINE_ALIAS
 from ..fluid.dygraph.jit import declarative as to_static  #DEFINE_ALIAS
 from ..fluid.dygraph import ProgramTranslator  #DEFINE_ALIAS
 from ..fluid.dygraph.io import TranslatedLayer  #DEFINE_ALIAS