Remove all {python,srcs}_version = "PY3" references.

PiperOrigin-RevId: 477817453

Author: lingvo-bot

lingvo/BUILD

@@ -20,7 +20,6 @@ config_setting(
 py_library(
     name = "base_runner",
     srcs = ["base_runner.py"],
-    srcs_version = "PY3",
     deps = [
         ":base_trial",
         ":compat",
@@ -36,7 +35,6 @@ py_library(
 py_library(
     name = "base_trial",
     srcs = ["base_trial.py"],
-    srcs_version = "PY3",
     deps = [
         "//lingvo/core:hyperparams",
     ],
@@ -45,7 +43,6 @@ py_library(
 py_library(
     name = "compat",
     srcs = ["compat.py"],
-    srcs_version = "PY3",
     deps = [
         # Implicit absl.flags dependency.
         # Implicit absl.logging dependency.
@@ -56,8 +53,6 @@ py_library(
 py_test(
     name = "compat_test",
     srcs = ["compat_test.py"],
-    python_version = "PY3",
-    srcs_version = "PY3",
     deps = [
         ":compat",
     ],
@@ -66,14 +61,12 @@ py_test(
 py_library(
     name = "model_imports_no_params",
     srcs = ["model_imports.py"],
-    srcs_version = "PY3",
 )
 
 # Depend on this for access to the model registry with params for all tasks as
 # transitive deps.  Only py_binary should depend on this target.
 py_library(
     name = "model_imports",
-    srcs_version = "PY3",
     deps = [
         ":model_imports_no_params",
         "//lingvo/tasks:all_params",
@@ -83,8 +76,6 @@ py_library(
 py_test(
     name = "model_import_test",
     srcs = ["model_import_test.py"],
-    python_version = "PY3",
-    srcs_version = "PY3",
     deps = [
         ":compat",
         ":model_imports_no_params",
@@ -95,7 +86,6 @@ py_library(
     name = "models_test_helper",
     testonly = 1,
     srcs = ["models_test_helper.py"],
-    srcs_version = "PY3",
     deps = [
         ":compat",
         ":datasets_lib",
@@ -112,8 +102,6 @@ py_library(
 py_test(
     name = "models_test",
     srcs = ["models_test.py"],
-    python_version = "PY3",
-    srcs_version = "PY3",
     deps = [
         ":compat",
         ":model_imports",
@@ -127,7 +115,6 @@ py_test(
 py_library(
     name = "model_registry",
     srcs = ["model_registry.py"],
-    srcs_version = "PY3",
     deps = [
         ":compat",
         ":model_imports_no_params",
@@ -139,16 +126,13 @@ py_library(
 py_test(
     name = "model_registry_test",
     srcs = ["model_registry_test.py"],
-    python_version = "PY3",
-    srcs_version = "PY3",
     deps = [":model_registry_test_lib"],
 )
 
 py_library(
     name = "model_registry_test_lib",
     testonly = 1,
     srcs = ["model_registry_test.py"],
-    srcs_version = "PY3",
     deps = [
         ":compat",
         ":model_registry",
@@ -165,7 +149,6 @@ py_library(
 pytype_strict_library(
     name = "datasets_lib",
     srcs = ["datasets.py"],
-    srcs_version = "PY3",
     deps = [
         # Implicit absl.logging dependency.
     ],
@@ -174,8 +157,6 @@ pytype_strict_library(
 py_test(
     name = "datasets_test",
     srcs = ["datasets_test.py"],
-    python_version = "PY3",
-    srcs_version = "PY3",
     deps = [
         ":compat",
         ":datasets_lib",
@@ -187,7 +168,6 @@ py_test(
 py_library(
     name = "runners",
     srcs = ["runners.py"],
-    srcs_version = "PY3",
     deps = [
         ":compat",
         ":pdb_wrapper",
@@ -209,7 +189,6 @@ py_library(
 py_library(
     name = "eager_runners",
     srcs = ["eager_runners.py"],
-    srcs_version = "PY3",
     deps = [
         ":compat",
         "//lingvo:base_runner",
@@ -225,7 +204,6 @@ py_library(
 py_library(
     name = "trainer_lib",
     srcs = ["trainer.py"],
-    srcs_version = "PY3",
     deps = [
         ":base_trial",
         ":compat",
@@ -251,8 +229,6 @@ py_library(
 lingvo_py_binary(
     name = "trainer",
     srcs = [":trainer_lib"],
-    python_version = "PY3",
-    srcs_version = "PY3",
     deps = [
         ":model_imports",
         ":trainer_lib",
@@ -264,9 +240,7 @@ py_test(
     size = "large",
     timeout = "long",
     srcs = ["trainer_test.py"],
-    python_version = "PY3",
     shard_count = 12,
-    srcs_version = "PY3",
     tags = [
         "noasan",
         "nomsan",
@@ -300,7 +274,6 @@ py_library(
     name = "trainer_test_lib",
     testonly = 1,
     srcs = ["trainer_test.py"],
-    srcs_version = "PY3",
     tags = [
         "noasan",
         "nomsan",
@@ -334,8 +307,6 @@ lingvo_py_binary(
     data = [
         "//lingvo/tasks/punctuator/tools:download_brown_corpus",
     ],
-    python_version = "PY3",
-    srcs_version = "PY3",
     deps = [
         ":model_imports",  # build_cleaner: keep
         ":trainer_lib",  # build_cleaner: keep
@@ -362,7 +333,6 @@ genrule(
 py_library(
     name = "executor_lib",
     srcs = ["executor.py"],
-    srcs_version = "PY3",
     deps = [
         ":compat",
         ":pdb_wrapper",