Code cleanup: unused python vars & imports

Use frosted rather then pyflakes

source/blender/datatoc/datatoc_icon_split.py

@@ -164,7 +164,6 @@ def dice(filepath, output, output_prefix, name_style,
          minx_icon, miny_icon, maxx_icon, maxy_icon,
          spacex_icon, spacey_icon,
          ):
-    import struct
 
     is_simple = (max(minx, miny, maxx, maxy,
                      minx_icon, miny_icon, maxx_icon, maxy_icon,
@@ -209,7 +208,7 @@ def dice(filepath, output, output_prefix, name_style,
 
             # simple, no margins
             if is_simple:
-                sub_x = x * icon_x
+                sub_x = x * icon_w
                 sub_y = y * icon_h
             else:
                 sub_x = minx + ((x * (icon_w + spacex_icon)) + minx_icon)

source/tests/bl_rna_wiki_reference.py

@@ -96,7 +96,7 @@ def test_urls():
     import rna_wiki_reference
 
     import urllib.error
-    from urllib.request import urlopen
+   from urllib.request import urlopen
 
     prefix = rna_wiki_reference.url_manual_prefix
     urls = {suffix for (rna_id, suffix) in rna_wiki_reference.url_manual_mapping}
@@ -118,7 +118,7 @@ def test_urls():
         print("  %s ... " % url_full, end="")
         sys.stdout.flush()
         try:
-            urllib.request.urlopen(url_full)
+            urlopen(url_full)
             print(color_green + "OK" + color_normal)
         except urllib.error.HTTPError:
             print(color_red + "FAIL!" + color_normal)

source/tests/pep8.py

@@ -20,15 +20,16 @@
 
 import os
 
-# depends on pep8, pyflakes, pylint
+# depends on pep8, frosted, pylint
 # for Ubuntu
 #
-#   sudo apt-get install pylint pyflakes
+#   sudo apt-get install pylint
 #
 #   sudo apt-get install python-setuptools python-pip
 #   sudo pip install pep8
+#   sudo pip install frosted
 #
-# in Debian install pylint pyflakes pep8 with apt-get/aptitude/etc
+# in Debian install pylint pep8 with apt-get/aptitude/etc
 #
 # on *nix run
 #   python source/tests/pep8.py > test_pep8.log 2>&1
@@ -118,10 +119,10 @@ def main():
 
         os.system("pep8 --repeat --ignore=%s '%s'" % (",".join(ignore_tmp), f))
 
-    # pyflakes
-    print("\n\n\n# running pyflakes...")
+    # frosted
+    print("\n\n\n# running frosted...")
     for f, pep8_type in files:
-        os.system("pyflakes '%s'" % f)
+        os.system("frosted '%s'" % f)
 
     print("\n\n\n# running pylint...")
     for f, pep8_type in files:

source/tests/rst_to_doctree_mini.py

@@ -50,7 +50,6 @@ def parse_rst_py(filepath):
     indent_map = {}
     indent_prev = 0
     f = open(filepath, encoding="utf-8")
-    indent_lists = []
     for i, line in enumerate(f):
         line_strip = line.lstrip()
         # ^\.\.\s[a-zA-Z09\-]+::.*$