stagemanager: Move functionality into the scripts directory

Since scripts is now in PATH thanks to the layer functionality there is
no longer any need to have this recipe full of special cases, the scripts
can just be placed there.

Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

meta/classes/packaged-staging.bbclass

@@ -23,7 +23,6 @@ PSTAGE_SCAN_CMD ?= "find ${PSTAGE_TMPDIR_STAGE} \( -name "*.la" -o -name "*-conf
 
 PSTAGE_NATIVEDEPENDS = "\
     shasum-native \
-    stagemanager-native \
     "
 
 BB_STAMP_WHITELIST = "${PSTAGE_NATIVEDEPENDS}"
@@ -63,10 +62,6 @@ python () {
     # Add task dependencies if we're active, otherwise mark packaged staging
     # as inactive.
     if pstage_allowed:
-        deps = bb.data.getVarFlag('do_setscene', 'depends', d) or ""
-        deps += " stagemanager-native:do_populate_sysroot"
-        bb.data.setVarFlag('do_setscene', 'depends', deps, d)
-
         policy = bb.data.getVar("BB_STAMP_POLICY", d, True)
         if policy == "whitelist" or policy == "full":
            deps = bb.data.getVarFlag('do_setscene', 'recrdeptask', d) or ""