[rhoai-2.25] chore: remove orphan Dockerfiles and PDF install scripts - #2694

• Namespace: rhoai-tenant
• PipelineRun: odh-workbench-jupyter-minimal-rocm-py312-on-pull-request-mxvmb

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Task Statuses:

Status	Duration	Name
🟢 Succeeded	6 seconds	rhoai-init
🟢 Succeeded	5 seconds	init
🟢 Succeeded	31 seconds	clone-repository
🟢 Succeeded	16 seconds	prefetch-dependencies
🔴 Failed	3 hours	build-images

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Failure snippet:

task build-images has the status "TaskRunCancelled":

TaskRun "odh-workbench-jupye4e44eeddfde34b170387fdec20faf6e-build-images" was cancelled. TaskRun cancelled as the PipelineRun it belongs to has timed out.