utils: Drop unused variable staging_install from oe_libinstall

Remove unused variable/code.

(From OE-Core rev: 76ade5a2a55eda2975dfa5d6a30ac4cb74421567)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/utils.bbclass

@@ -30,7 +30,6 @@ oe_libinstall() {
 	silent=""
 	require_static=""
 	require_shared=""
-	staging_install=""
 	while [ "$#" -gt 0 ]; do
 		case "$1" in
 		-C)
@@ -62,10 +61,6 @@ oe_libinstall() {
 	if [ -z "$destpath" ]; then
 		bbfatal "oe_libinstall: no destination path specified"
 	fi
-	if echo "$destpath/" | egrep '^${STAGING_LIBDIR}/' >/dev/null
-	then
-		staging_install=1
-	fi
 
 	__runcmd () {
 		if [ -z "$silent" ]; then