Improve `tflite` exports for Tests CI (#13094)

ultralytics/engine/exporter.py

@@ -75,7 +75,6 @@ from ultralytics.utils import (
     ARM64,
     DEFAULT_CFG,
     IS_JETSON,
-    IS_RASPBERRYPI,
     LINUX,
     LOGGER,
     MACOS,
@@ -1012,7 +1011,7 @@ class Exporter:
         """Add metadata to *.tflite models per https://www.tensorflow.org/lite/models/convert/metadata."""
         import flatbuffers
 
-        if MACOS or IS_RASPBERRYPI:  # TODO: should this be 'if ARM64:'?
+        if ARM64:
             from tflite_support import metadata  # noqa
             from tflite_support import metadata_schema_py_generated as schema  # noqa
         else: