Remove check_requirements('flatbuffers==1.12') (ultralytics#9514)

* Remove `check_requirements('flatbuffers==1.12')`

Signed-off-by: Glenn Jocher <glenn.jocher@ultralytics.com>

* Update ci-testing.yml

Signed-off-by: Glenn Jocher <glenn.jocher@ultralytics.com>

* Update ci-testing.yml

Signed-off-by: Glenn Jocher <glenn.jocher@ultralytics.com>

Signed-off-by: Glenn Jocher <glenn.jocher@ultralytics.com>

export.py

@@ -534,8 +534,6 @@ def run(
     if coreml:  # CoreML
         f[4], _ = export_coreml(model, im, file, int8, half)
     if any((saved_model, pb, tflite, edgetpu, tfjs)):  # TensorFlow formats
-        if int8 or edgetpu:  # TFLite --int8 bug https://github.com/ultralytics/yolov5/issues/5707
-            check_requirements('flatbuffers==1.12')  # required before `import tensorflow`
         assert not tflite or not tfjs, 'TFLite and TF.js models must be exported separately, please pass only one type.'
         assert not isinstance(model, ClassificationModel), 'ClassificationModel export to TF formats not yet supported.'
         f[5], s_model = export_saved_model(model.cpu(),