[ARMNN EP] Remove ArmNN Execution Provider
Merged
WA
8mo ago+23+23+01234567890123456789-2151-2151-0123456789012345678901234567890123456789
Description
Remove the ArmNN Execution Provider: build flags, provider registration, APIs, tests, and
packaging references are deleted, along with the ArmNN provider implementation sources.
Motivation and Context
ArmNN EP has been deprecated/removed per release notes, and the repo should no longer expose
build options, APIs, or documentation for it. This change aligns the codebase with that
removal.