chore(compression): remove test_models.py (#3587)

Remove test_models module and its tests, now superseded by
model_editor.

BUG=part of #3256

Author: rkuester

tensorflow/lite/micro/compression/BUILD

@@ -205,27 +205,6 @@ py_test(
     ],
 )
 
-tflm_py_library(
-    name = "test_models",
-    srcs = ["test_models.py"],
-    deps = [
-        "//tensorflow/lite/python:schema_py",
-        requirement("flatbuffers"),
-        requirement("numpy"),
-    ],
-)
-
-py_test(
-    name = "test_models_test",
-    size = "small",
-    srcs = ["test_models_test.py"],
-    target_compatible_with = INCOMPATIBLE_WITH_WINDOWS,
-    deps = [
-        ":test_models",
-        "//tensorflow/lite/python:schema_py",
-    ],
-)
-
 tflm_py_library(
     name = "tensor_type",
     srcs = ["tensor_type.py"],