Fix case sensitivity issue by deleting unused img files

[ottlseo]

… img files)

Issue #, if available:

warning: the following paths have collided (e.g. case-sensitive paths
on a case-insensitive filesystem) and only one from the same
colliding group is in the working tree:

  'sagemaker/sm-scale-down-to-zero/imgs/Architecture.png'
  'sagemaker/sm-scale-down-to-zero/imgs/architecture.png'
  'sagemaker/sm-scale-down-to-zero/utils/imgs/Architecture.png'
  'sagemaker/sm-scale-down-to-zero/utils/imgs/architecture.png'

Description of changes:

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