Revert "runtime: improve ICDs binding speed"
When a JSON manifest in the graphics provider contains an architecture-specific absolute library path (like Mesa in most distributions), we relied on the kind being set to ICD_KIND_NONEXISTENT when we tried the other word size; otherwise, we would create a duplicate JSON manifest, which apparently confuses at least Proton.
This reverts commit ee73d5bd.
Signed-off-by: Simon McVittie smcv@collabora.com