utils/scanpypi: remove python six module

We dropped support for python2 a while back in [1], as such we
can remove the python six module which was only needed for
backwards comaptibility with python2.

[1] https://gitlab.com/buildroot.org/buildroot/-/commit/2743ce00ca61fde1537b64a165a69d497052be58

Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
[Julien: add commit ref removing python2 support]
Signed-off-by: Julien Olivain <ju.o@free.fr>

utils/scanpypi

@@ -22,16 +22,10 @@ import tempfile
 import traceback
 import importlib
 import importlib.metadata
-import six.moves.urllib.request
-import six.moves.urllib.error
-import six.moves.urllib.parse
-from six.moves import map
-from six.moves import zip
-from six.moves import input
-if six.PY2:
-    import StringIO
-else:
-    import io
+import urllib.request
+import urllib.error
+import urllib.parse
+import io
 
 BUF_SIZE = 65536
 
@@ -225,15 +219,15 @@ class BuildrootPackage():
         self.metadata_url = 'https://pypi.org/pypi/{pkg}/json'.format(
             pkg=self.real_name)
         try:
-            pkg_json = six.moves.urllib.request.urlopen(self.metadata_url).read().decode()
-        except six.moves.urllib.error.HTTPError as error:
+            pkg_json = urllib.request.urlopen(self.metadata_url).read().decode()
+        except urllib.error.HTTPError as error:
             print('ERROR:', error.getcode(), error.msg, file=sys.stderr)
             print('ERROR: Could not find package {pkg}.\n'
                   'Check syntax inside the python package index:\n'
                   'https://pypi.python.org/pypi/ '
                   .format(pkg=self.real_name))
             raise
-        except six.moves.urllib.error.URLError:
+        except urllib.error.URLError:
             print('ERROR: Could not find package {pkg}.\n'
                   'Check syntax inside the python package index:\n'
                   'https://pypi.python.org/pypi/ '
@@ -260,7 +254,7 @@ class BuildrootPackage():
                 'digests': None}]
             # In this case, we can't get the name of the downloaded file
             # from the pypi api, so we need to find it, this should work
-            urlpath = six.moves.urllib.parse.urlparse(
+            urlpath = urllib.parse.urlparse(
                 self.metadata['info']['download_url']).path
             # urlparse().path give something like
             # /path/to/file-version.tar.gz
@@ -272,8 +266,8 @@ class BuildrootPackage():
             try:
                 print('Downloading package {pkg} from {url}...'.format(
                     pkg=self.real_name, url=download_url['url']))
-                download = six.moves.urllib.request.urlopen(download_url['url'])
-            except six.moves.urllib.error.HTTPError as http_error:
+                download = urllib.request.urlopen(download_url['url'])
+            except urllib.error.HTTPError as http_error:
                 download = http_error
             else:
                 self.used_url = download_url
@@ -288,7 +282,7 @@ class BuildrootPackage():
             raise DownloadFailed('Failed to download package {pkg}: '
                                  'No source archive available'
                                  .format(pkg=self.real_name))
-        elif download.__class__ == six.moves.urllib.error.HTTPError:
+        elif download.__class__ == urllib.error.HTTPError:
             raise download
 
         self.filename = self.used_url['filename']
@@ -317,10 +311,7 @@ class BuildrootPackage():
         Keyword arguments:
         tmp_path -- directory where you want the package to be extracted
         """
-        if six.PY2:
-            as_file = StringIO.StringIO(self.as_string)
-        else:
-            as_file = io.BytesIO(self.as_string)
+        as_file = io.BytesIO(self.as_string)
         if self.filename[-3:] == 'zip':
             with zipfile.ZipFile(as_file) as as_zipfile:
                 tmp_pkg = os.path.join(tmp_path, self.buildroot_name)
@@ -797,12 +788,12 @@ def main():
             print('Fetching package', package.real_name)
             try:
                 package.fetch_package_info()
-            except (six.moves.urllib.error.URLError, six.moves.urllib.error.HTTPError):
+            except (urllib.error.URLError, urllib.error.HTTPError):
                 continue
 
             try:
                 package.download_package()
-            except six.moves.urllib.error.HTTPError as error:
+            except urllib.error.HTTPError as error:
                 print('Error: {code} {reason}'.format(code=error.code,
                                                       reason=error.reason))
                 print('Error downloading package :', package.buildroot_name)