rust-bin.bbclass: remove unused class

diff --git a/meta/classes-recipe/rust-bin.bbclass b/meta/classes-recipe/rust-bin.bbclass
deleted file mode 100644
index b8e7ef8191..0000000000
--- a/meta/classes-recipe/rust-bin.bbclass
+++ /dev/null
@@ -1,154 +0,0 @@ 
-#
-# Copyright OpenEmbedded Contributors
-#
-# SPDX-License-Identifier: MIT
-#
-
-inherit rust
-
-RDEPENDS:${PN}:append:class-target = " ${RUSTLIB_DEP}"
-
-RUSTC_ARCHFLAGS += "-C opt-level=3 -g -L ${STAGING_DIR_HOST}/${rustlibdir} -C linker=${RUST_TARGET_CCLD}"
-EXTRA_OEMAKE += 'RUSTC_ARCHFLAGS="${RUSTC_ARCHFLAGS}"'
-
-# Some libraries alias with the standard library but libstd is configured to
-# make it difficult or imposisble to use its version. Unfortunately libstd
-# must be explicitly overridden using extern.
-OVERLAP_LIBS = "\
-    libc \
-    log \
-    getopts \
-    rand \
-"
-def get_overlap_deps(d):
-    deps = d.getVar("DEPENDS").split()
-    overlap_deps = []
-    for o in d.getVar("OVERLAP_LIBS").split():
-        l = len([o for dep in deps if (o + '-rs' in dep)])
-        if l > 0:
-            overlap_deps.append(o)
-    return " ".join(overlap_deps)
-OVERLAP_DEPS = "${@get_overlap_deps(d)}"
-
-# Prevents multiple static copies of standard library modules
-# See https://github.com/rust-lang/rust/issues/19680
-RUSTC_PREFER_DYNAMIC = "-C prefer-dynamic"
-RUSTC_FLAGS += "${RUSTC_PREFER_DYNAMIC}"
-
-CRATE_NAME ?= "${@d.getVar('BPN').replace('-rs', '').replace('-', '_')}"
-BINNAME ?= "${BPN}"
-LIBNAME ?= "lib${CRATE_NAME}-rs"
-CRATE_TYPE ?= "dylib"
-BIN_SRC ?= "${S}/src/main.rs"
-LIB_SRC ?= "${S}/src/lib.rs"
-
-rustbindest ?= "${bindir}"
-rustlibdest ?= "${rustlibdir}"
-RUST_RPATH_ABS ?= "${rustlibdir}:${rustlib}"
-
-def relative_rpaths(paths, base):
-    relpaths = set()
-    for p in paths.split(':'):
-        if p == base:
-            relpaths.add('$ORIGIN')
-            continue
-        relpaths.add(os.path.join('$ORIGIN', os.path.relpath(p, base)))
-    return '-rpath=' + ':'.join(relpaths) if len(relpaths) else ''
-
-RUST_LIB_RPATH_FLAGS ?= "${@relative_rpaths(d.getVar('RUST_RPATH_ABS', True), d.getVar('rustlibdest', True))}"
-RUST_BIN_RPATH_FLAGS ?= "${@relative_rpaths(d.getVar('RUST_RPATH_ABS', True), d.getVar('rustbindest', True))}"
-
-def libfilename(d):
-    if d.getVar('CRATE_TYPE', True) == 'dylib':
-        return d.getVar('LIBNAME', True) + '.so'
-    else:
-        return d.getVar('LIBNAME', True) + '.rlib'
-
-def link_args(d, bin):
-    linkargs = []
-    if bin:
-        rpaths = d.getVar('RUST_BIN_RPATH_FLAGS', False)
-    else:
-        rpaths = d.getVar('RUST_LIB_RPATH_FLAGS', False)
-        if d.getVar('CRATE_TYPE', True) == 'dylib':
-            linkargs.append('-soname')
-            linkargs.append(libfilename(d))
-    if len(rpaths):
-        linkargs.append(rpaths)
-    if len(linkargs):
-        return ' '.join(['-Wl,' + arg for arg in linkargs])
-    else:
-        return ''
-
-get_overlap_externs () {
-    externs=
-    for dep in ${OVERLAP_DEPS}; do
-        extern=$(ls ${STAGING_DIR_HOST}/${rustlibdir}/lib$dep-rs.{so,rlib} 2>/dev/null \
-                    | awk '{print $1}');
-        if [ -n "$extern" ]; then
-            externs="$externs --extern $dep=$extern"
-        else
-            echo "$dep in depends but no such library found in ${rustlibdir}!" >&2
-            exit 1
-        fi
-    done
-    echo "$externs"
-}
-
-do_configure () {
-}
-
-oe_runrustc () {
-	bbnote ${RUSTC} ${RUSTC_ARCHFLAGS} ${RUSTC_FLAGS} "$@"
-	"${RUSTC}" ${RUSTC_ARCHFLAGS} ${RUSTC_FLAGS} "$@"
-}
-
-oe_compile_rust_lib () {
-    rm -rf ${LIBNAME}.{rlib,so}
-    local -a link_args
-    if [ -n '${@link_args(d, False)}' ]; then
-        link_args[0]='-C'
-        link_args[1]='link-args=${@link_args(d, False)}'
-    fi
-    oe_runrustc $(get_overlap_externs) \
-        "${link_args[@]}" \
-        ${LIB_SRC} \
-        -o ${@libfilename(d)} \
-        --crate-name=${CRATE_NAME} --crate-type=${CRATE_TYPE} \
-        "$@"
-}
-oe_compile_rust_lib[vardeps] += "get_overlap_externs"
-
-oe_compile_rust_bin () {
-    rm -rf ${BINNAME}
-    local -a link_args
-    if [ -n '${@link_args(d, True)}' ]; then
-        link_args[0]='-C'
-        link_args[1]='link-args=${@link_args(d, True)}'
-    fi
-    oe_runrustc $(get_overlap_externs) \
-        "${link_args[@]}" \
-        ${BIN_SRC} -o ${BINNAME} "$@"
-}
-oe_compile_rust_bin[vardeps] += "get_overlap_externs"
-
-oe_install_rust_lib () {
-    for lib in $(ls ${LIBNAME}.{so,rlib} 2>/dev/null); do
-        echo Installing $lib
-        install -D -m 755 $lib ${D}/${rustlibdest}/$lib
-    done
-}
-
-oe_install_rust_bin () {
-    echo Installing ${BINNAME}
-    install -D -m 755 ${BINNAME} ${D}/${rustbindest}/${BINNAME}
-}
-
-do_rust_bin_fixups() {
-    for f in `find ${PKGD} -name '*.so*'`; do
-        echo "Strip rust note: $f"
-        ${OBJCOPY} -R .note.rustc $f $f
-    done
-}
-PACKAGE_PREPROCESS_FUNCS += "do_rust_bin_fixups"
-