QA tweaks - use a single os type source mainly (drop get_os, use HOST_OS)

check

@@ -157,9 +157,6 @@ timestamp=${TIMESTAMP:=false}
 
 [ -f check.time ] || touch check.time
 
-_get_os
-if [ $os == "linux" ]; then
-
 FULL_FSTYP_DETAILS=`_full_fstyp_details`
 FULL_HOST_DETAILS=`_full_platform_details`
 FULL_MKFS_OPTIONS=`_scratch_mkfs_options`
@@ -172,12 +169,6 @@ MKFS_OPTIONS  -- $FULL_MKFS_OPTIONS
 MOUNT_OPTIONS -- $FULL_MOUNT_OPTIONS
 
 EOF
-fi
-
-#Linux specific flag '-f'
-if [ $os == "linux" ]; then
-   flag='-f'
-fi
 
 umount $SCRATCH_DEV 2>/dev/null
 # call the overridden mkfs.xfs - make sure the FS is built