[ansible] Fix nits in ironic_parted module

this is a followup to I4d6d7619c6f3ba25c29263ffe5d778698e598429
([ansible] Improve partition images support)

fixes some typos and removes commented/unused code.

Change-Id: Iafda13a657956bc04b591c0911cf3338705f33c4

ironic_staging_drivers/ansible/playbooks/library/ironic_parted.py

@@ -55,7 +55,7 @@ options:
         version_added: null
     label:
         description: |
-            type of a partition type to create;
+            type of a partition table to create;
             to use an existing partition table, omit it or pass null YAML value
         required: false
         default: none
@@ -74,7 +74,7 @@ options:
     partitions:
         description:|
             list of partitions. each entry is a dictionary in the form
-            - size: <int>, required, must be positive non-zero
+            - size: <int>, required, must be positive
               type: [primary, extended, logical], default is primary
               format: a format to pass to parted;
                       does not actually creates filesystems, only sets
@@ -150,14 +150,6 @@ def change_part_args(part_number, partition):
     return parted_args
 
 
-def parse_lsblk_output(output):
-    devices = set()
-    for line in output.splitlines():
-        device = line.strip().split('=')[1]
-        devices.add(device.strip('"'))
-    return devices
-
-
 def parse_lsblk_json(output):
 
     def get_names(devices):
@@ -294,7 +286,6 @@ def main():
     lsblk_bin = module.get_bin_path('lsblk', required=True)
     udevadm_bin = module.get_bin_path('udevadm', required=True)
     parted = [parted_bin, '-s', device]
-    # lsblk = [lsblk_bin, '-o', 'NAME', '-P', device]
     lsblk = [lsblk_bin, '-J', device]
     if label:
         module.run_command(parted + ['mklabel', label], check_rc=True)