gh-104780: Remove 2to3 program and lib2to3 module (#104781)

* Remove the Tools/scripts/2to3 script.
* Remove the Lib/test/test_lib2to3/ directory.
* Doc/tools/extensions/pyspecific.py: remove the "2to3fixer" object
  type.
* Makefile and PC/layout/main.py no longer compile lib2to3 grammar
  files.
* Update Makefile for 2to3 removal.

1 files changed, 0 insertions, 42 deletions

diff --git a/Lib/lib2to3/fixes/fix_unicode.py b/Lib/lib2to3/fixes/fix_unicode.py
deleted file mode 100644
index c7982c2b97c..00000000000
--- a/Lib/lib2to3/fixes/fix_unicode.py
+++ /dev/null
@@ -1,42 +0,0 @@
-r"""Fixer for unicode.
-
-* Changes unicode to str and unichr to chr.
-
-* If "...\u..." is not unicode literal change it into "...\\u...".
-
-* Change u"..." into "...".
-
-"""
-
-from ..pgen2 import token
-from .. import fixer_base
-
-_mapping = {"unichr" : "chr", "unicode" : "str"}
-
-class FixUnicode(fixer_base.BaseFix):
-    BM_compatible = True
-    PATTERN = "STRING | 'unicode' | 'unichr'"
-
-    def start_tree(self, tree, filename):
-        super(FixUnicode, self).start_tree(tree, filename)
-        self.unicode_literals = 'unicode_literals' in tree.future_features
-
-    def transform(self, node, results):
-        if node.type == token.NAME:
-            new = node.clone()
-            new.value = _mapping[node.value]
-            return new
-        elif node.type == token.STRING:
-            val = node.value
-            if not self.unicode_literals and val[0] in '\'"' and '\\' in val:
-                val = r'\\'.join([
-                    v.replace('\\u', r'\\u').replace('\\U', r'\\U')
-                    for v in val.split(r'\\')
-                ])
-            if val[0] in 'uU':
-                val = val[1:]
-            if val == node.value:
-                return node
-            new = node.clone()
-            new.value = val
-            return new