Adopt py_project

projects/datalog/BUILD

@@ -1,18 +1,3 @@
-py_library(
+py_project(
     name = "datalog",
-    srcs = glob(["src/python/**/*.py"]),
-    imports = [
-        "src/python",
-    ],
-    visibility = [
-        "//visibility:public",
-    ]
-)
-
-py_pytest(
-    name = "test_datalog",
-    srcs = glob(["test/python/**/*.py"]),
-    deps = [
-        ":datalog",
-    ]
 )