chore(website): remove outdated description #8163

Job	Run time
build-c-doc	23s
build-lua-doc	16s
build-java-doc	15s
build-nodejs-doc	20s
build-python-doc	3m 3s
build-rust-doc	3m 36s
build-cpp-doc	21s
build-dav-server-opendalfs-doc	42s
build-fuse3-opendal-doc	41s
build-haskell-doc	9m 11s
build-object-store-opendal-doc	43s
build-opendal-compat-doc	39s
build-ocaml-doc	4m 38s
build-parquet-opendal-doc	42s
build-unftp-sbe-opendal-doc	1m 9s
build-virtiofs-opendal-doc	46s
build-website	1m 20s
	28m 45s

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