docs: Remove redundant/stale docs

bump rocm-docs-core to 1.8.2

rm unused files

rm stale docs

fix sphinx conf

reorg docs

SWDEV-482203 -- add note to usage guides

update readmes

Change-Id: I9e0111ac8fe2a691ac964b27436ba47747c27904
Signed-off-by: Peter Park <Peter.Park@amd.com>

docs/sphinx/requirements.in

@@ -1 +1 @@
-rocm-docs-core[api_reference]==1.4.0
+rocm-docs-core[api_reference]==1.8.2