fuse2fs: drop fuse 2.x support code

We only enable fuse2fs if libfuse is from the 3.xx series and the lowlevel
libfuse API is present.  Drop support for 2.x.  This part is cribbed from Amir
who used an LLM aided conversion for fuse4fs, but the maintainer requested that
I apply it to fuse2fs as well.

Co-developed-by: Claude claude-4-sonnet
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: "Darrick J. Wong" <djwong@kernel.org>
3 files changed