Remove encoding/unicode_errors options from Packer (#378)

msgpack/fallback.py

@@ -752,32 +752,14 @@ class Packer(object):
         Additionally tuples will not be serialized as lists.
         This is useful when trying to implement accurate serialization
         for python types.
-
-    :param str encoding:
-        (deprecated) Convert unicode to bytes with this encoding. (default: 'utf-8')
-
-    :param str unicode_errors:
-        Error handler for encoding unicode. (default: 'strict')
     """
-    def __init__(self, default=None, encoding=None, unicode_errors=None,
+    def __init__(self, default=None,
                  use_single_float=False, autoreset=True, use_bin_type=False,
                  strict_types=False):
-        if encoding is None:
-            encoding = 'utf_8'
-        else:
-            warnings.warn(
-                "encoding is deprecated, Use raw=False instead.",
-                DeprecationWarning, stacklevel=2)
-
-        if unicode_errors is None:
-            unicode_errors = 'strict'
-
         self._strict_types = strict_types
         self._use_float = use_single_float
         self._autoreset = autoreset
         self._use_bin_type = use_bin_type
-        self._encoding = encoding
-        self._unicode_errors = unicode_errors
         self._buffer = StringIO()
         if default is not None:
             if not callable(default):
@@ -834,11 +816,7 @@ class Packer(object):
                 self._pack_bin_header(n)
                 return self._buffer.write(obj)
             if check(obj, unicode):
-                if self._encoding is None:
-                    raise TypeError(
-                        "Can't encode unicode string: "
-                        "no encoding is specified")
-                obj = obj.encode(self._encoding, self._unicode_errors)
+                obj = obj.encode("utf-8")
                 n = len(obj)
                 if n >= 2**32:
                     raise ValueError("String is too large")