Remove no longer needed `Lint as` directives. (#1002)

Porting the changes from http://cl/436387753 to GitHub

BUG=cleanup

tensorflow/lite/micro/examples/hello_world/train/train_hello_world_model.py

-# Lint as: python3
 # Copyright 2022 The TensorFlow Authors. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

tensorflow/lite/micro/examples/magic_wand/train/data_augmentation.py

-# Lint as: python3
 # Copyright 2019 The TensorFlow Authors. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

tensorflow/lite/micro/examples/magic_wand/train/data_augmentation_test.py

-# Lint as: python3
 # Copyright 2019 The TensorFlow Authors. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

tensorflow/lite/micro/examples/magic_wand/train/data_load.py

-# Lint as: python3
 # Copyright 2019 The TensorFlow Authors. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

tensorflow/lite/micro/examples/magic_wand/train/data_load_test.py

-# Lint as: python3
 # Copyright 2019 The TensorFlow Authors. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

tensorflow/lite/micro/examples/magic_wand/train/data_prepare.py

-# Lint as: python3
 # coding=utf-8
 # Copyright 2019 The TensorFlow Authors. All Rights Reserved.
 #

tensorflow/lite/micro/examples/magic_wand/train/data_prepare_test.py

-# Lint as: python3
 # Copyright 2019 The TensorFlow Authors. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

tensorflow/lite/micro/examples/magic_wand/train/data_split.py

-# Lint as: python3
 # coding=utf-8
 # Copyright 2019 The TensorFlow Authors. All Rights Reserved.
 #

tensorflow/lite/micro/examples/magic_wand/train/data_split_person.py

-# Lint as: python3
 # coding=utf-8
 # Copyright 2019 The TensorFlow Authors. All Rights Reserved.
 #

tensorflow/lite/micro/examples/magic_wand/train/data_split_person_test.py

-# Lint as: python3
 # Copyright 2019 The TensorFlow Authors. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

tensorflow/lite/micro/examples/magic_wand/train/data_split_test.py

-# Lint as: python3
 # Copyright 2019 The TensorFlow Authors. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

tensorflow/lite/micro/examples/magic_wand/train/train.py

-# Lint as: python3
 # Copyright 2019 The TensorFlow Authors. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

tensorflow/lite/micro/examples/magic_wand/train/train_test.py

-# Lint as: python3
 # Copyright 2019 The TensorFlow Authors. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

tensorflow/lite/micro/kernels/arc_mli/add.cc

@@ -161,7 +161,7 @@ TfLiteStatus CalculateOpData(TfLiteContext* context, TfLiteAddParams* params,
     CalculateActivationRange(params->activation,
                              &data->output_activation_min_f32,
                              &data->output_activation_max_f32);
-#endif  //#if !defined(TF_LITE_STRIP_REFERENCE_IMPL)
+#endif  // !defined(TF_LITE_STRIP_REFERENCE_IMPL)
   }
 
   return kTfLiteOk;

tensorflow/lite/micro/kernels/ceva/fully_connected.cc

@@ -25,7 +25,7 @@ limitations under the License.
 #include "tensorflow/lite/kernels/kernel_util.h"
 #include "tensorflow/lite/micro/kernels/ceva/ceva_tflm_lib.h"
 #include "tensorflow/lite/micro/kernels/kernel_util.h"
-//#define MCPS_MEASUREMENT
+// #define MCPS_MEASUREMENT
 #ifdef MCPS_MEASUREMENT
 #include "tensorflow/lite/micro/kernels/ceva/mcps_macros.h"
 #endif

tensorflow/lite/micro/kernels/cmsis_nn/pooling.cc

@@ -15,7 +15,6 @@ limitations under the License.
 #include "tensorflow/lite/kernels/internal/reference/pooling.h"
 
 #include "CMSIS/NN/Include/arm_nnfunctions.h"
-//#include "flatbuffers/base.h"
 #include "tensorflow/lite/c/builtin_op_data.h"
 #include "tensorflow/lite/c/common.h"
 #include "tensorflow/lite/kernels/internal/tensor_ctypes.h"

tensorflow/lite/micro/tools/generate_cc_arrays.py

-# Lint as: python2, python3
 # Copyright 2021 The TensorFlow Authors. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

tensorflow/lite/micro/tools/make/generate_keil_project.py

-# Lint as: python2, python3
 # Copyright 2019 The TensorFlow Authors. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");