LGTM.com - false positive - Sensitive data (id) is logged

**Description of the false positive**

Variable names may contain `UID` but it refers to the unique identifiers of [DICOM](https://en.wikipedia.org/wiki/DICOM) images and in the context of reading DICOM images this is not really sensitive and actually quite useful.

https://lgtm.com/projects/g/pydicom/pydicom/snapshot/b3ab7ceed7ea4b8b79e6f72248096c97dd527328/files/examples/input_output/plot_read_dicom.py#x9f6ff454e3dded9b:1

https://lgtm.com/projects/g/pydicom/pydicom/snapshot/b3ab7ceed7ea4b8b79e6f72248096c97dd527328/files/pydicom/fileset.py#x92cc3e7130d36e7d:1

https://lgtm.com/projects/g/pydicom/pydicom/snapshot/b3ab7ceed7ea4b8b79e6f72248096c97dd527328/files/pydicom/fileset.py#xe8e83c6abceded69:1

https://lgtm.com/projects/g/pydicom/pydicom/snapshot/b3ab7ceed7ea4b8b79e6f72248096c97dd527328/files/pydicom/fileset.py#x322737eb169b0d2a:1

https://lgtm.com/projects/g/pydicom/pydicom/snapshot/b3ab7ceed7ea4b8b79e6f72248096c97dd527328/files/pydicom/fileset.py#xed0b10d5ac1c529d:1

https://lgtm.com/projects/g/pydicom/pydicom/snapshot/b3ab7ceed7ea4b8b79e6f72248096c97dd527328/files/pydicom/uid.py#xf399f778f423689c:1

https://lgtm.com/projects/g/pydicom/pydicom/snapshot/b3ab7ceed7ea4b8b79e6f72248096c97dd527328/files/pydicom/uid.py#x9dbc6970b92dab79:1

https://lgtm.com/projects/g/pydicom/pydicom/snapshot/b3ab7ceed7ea4b8b79e6f72248096c97dd527328/files/examples/input_output/plot_read_fileset.py#x87ca98b04d02d94c:1

https://lgtm.com/projects/g/pydicom/pydicom/snapshot/b3ab7ceed7ea4b8b79e6f72248096c97dd527328/files/pydicom/_uid_dict.py#xe57e923c8e1b6ef2:1

https://lgtm.com/projects/g/pydicom/pydicom/snapshot/b3ab7ceed7ea4b8b79e6f72248096c97dd527328/files/source/generate_uids/generate_storage_sopclass_uids.py#xa8de055eb0c88014:1

https://lgtm.com/projects/g/pydicom/pydicom/snapshot/b3ab7ceed7ea4b8b79e6f72248096c97dd527328/files/source/generate_uids/generate_storage_sopclass_uids.py#x308ab3116bb90ea9:1

https://lgtm.com/projects/g/pydicom/pydicom/snapshot/b3ab7ceed7ea4b8b79e6f72248096c97dd527328/files/source/generate_uids/generate_storage_sopclass_uids.py#xbd9ab537eadfe9d9:1