fuse-overlayfs: remove C implementation

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>

Author: giuseppe

.clang-format

@@ -1,23 +1,2 @@
-*.a
-*.cache
-*.o
-*.rlib
 /target/
 .cargo/
-.deps
-Makefile
-Makefile.in
-aclocal.m4
-build-aux
-config.h
-config.h.in
-config.log
-config.status
-configure
-fuse-overlayfs
-lib/.deps
-lib/Makefile
-lib/Makefile.in
-lib/limits.h
-lib/sys/types.h
-stamp-h1