Remove differential_privacy dp_event classes from TFP top-level symbols.

PiperOrigin-RevId: 454238513

Author: galenmandrew

tensorflow_privacy/BUILD

@@ -37,7 +37,6 @@ py_library(
         "//tensorflow_privacy/privacy/optimizers:dp_optimizer_keras",
         "//tensorflow_privacy/privacy/optimizers:dp_optimizer_keras_vectorized",
         "//tensorflow_privacy/v1:tensorflow_privacy_v1",
-        "@com_google_differential_py//python/dp_accounting:dp_event",
     ],
 )
 

tensorflow_privacy/__init__.py

@@ -25,18 +25,6 @@
   # TensorFlow v1 imports
   from tensorflow_privacy import v1
 
-  # DpEvents
-  from com_google_differential_py.python.dp_accounting.dp_event import DpEvent
-  from com_google_differential_py.python.dp_accounting.dp_event import NoOpDpEvent
-  from com_google_differential_py.python.dp_accounting.dp_event import NonPrivateDpEvent
-  from com_google_differential_py.python.dp_accounting.dp_event import UnsupportedDpEvent
-  from com_google_differential_py.python.dp_accounting.dp_event import GaussianDpEvent
-  from com_google_differential_py.python.dp_accounting.dp_event import SelfComposedDpEvent
-  from com_google_differential_py.python.dp_accounting.dp_event import ComposedDpEvent
-  from com_google_differential_py.python.dp_accounting.dp_event import PoissonSampledDpEvent
-  from com_google_differential_py.python.dp_accounting.dp_event import SampledWithReplacementDpEvent
-  from com_google_differential_py.python.dp_accounting.dp_event import SampledWithoutReplacementDpEvent
-
   # Analysis
   from tensorflow_privacy.privacy.analysis.compute_dp_sgd_privacy_lib import compute_dp_sgd_privacy
   from tensorflow_privacy.privacy.analysis.rdp_accountant import compute_heterogeneous_rdp