Remove dead utils code

Found with https://github.com/asottile/dead

Thanks, @asottile!

marshmallow/compat.py

@@ -13,7 +13,6 @@
     urlparse = urlparse
     text_type = unicode
     binary_type = str
-    string_types = (str, unicode)
     unicode = unicode
     basestring = basestring
     iterkeys = lambda d: d.iterkeys()
@@ -27,7 +26,6 @@
     urlparse = urllib.parse
     text_type = str
     binary_type = bytes
-    string_types = (str,)
     unicode = str
     basestring = (str, bytes)
     iterkeys = lambda d: d.keys()

marshmallow/utils.py

@@ -10,9 +10,7 @@
 import re
 import time
 import types
-import warnings
 from calendar import timegm
-from decimal import Decimal, ROUND_HALF_EVEN, Context, Inexact
 from email.utils import formatdate, parsedate
 from pprint import pprint as py_pprint
 
@@ -60,11 +58,6 @@ def is_iterable_but_not_string(obj):
     )
 
 
-def is_indexable_but_not_string(obj):
-    """Return True if ``obj`` is indexable but isn't a string."""
-    return not hasattr(obj, 'strip') and hasattr(obj, '__getitem__')
-
-
 def is_collection(obj):
     """Return True if ``obj`` is a collection type, e.g list, tuple, queryset."""
     return is_iterable_but_not_string(obj) and not isinstance(obj, Mapping)
@@ -83,27 +76,6 @@ def is_keyed_tuple(obj):
     """
     return isinstance(obj, tuple) and hasattr(obj, '_fields')
 
-def float_to_decimal(f):
-    """Convert a floating point number to a Decimal with no loss of information.
-        See: https://docs.python.org/release/2.6.7/library/decimal.html#decimal-faq
-    """
-    n, d = f.as_integer_ratio()
-    numerator, denominator = Decimal(n), Decimal(d)
-    ctx = Context(prec=60)
-    result = ctx.divide(numerator, denominator)
-    while ctx.flags[Inexact]:
-        ctx.flags[Inexact] = False
-        ctx.prec *= 2
-        result = ctx.divide(numerator, denominator)
-    return result
-
-
-ZERO_DECIMAL = Decimal()
-
-def decimal_to_fixed(value, precision):
-    """Convert a `Decimal` to a fixed-precision number as a string."""
-    return text_type(value.quantize(precision, rounding=ROUND_HALF_EVEN))
-
 
 def to_marshallable_type(obj, field_names=None):
     """Helper for converting an object to a dictionary only if it is not
@@ -141,7 +113,6 @@ def pprint(obj, *args, **kwargs):
 
 # From pytz: http://pytz.sourceforge.net/
 ZERO = datetime.timedelta(0)
-HOUR = datetime.timedelta(hours=1)
 
 
 class UTC(datetime.tzinfo):
@@ -270,11 +241,6 @@ def from_rfc(datestring, use_dateutil=True):
         return datetime.datetime.fromtimestamp(timestamp)
 
 
-def from_iso(datestring, use_dateutil=True):
-    warnings.warn('from_iso is deprecated. Use from_iso_datetime instead.', UserWarning)
-    return from_iso_datetime(datestring, use_dateutil)
-
-
 def from_iso_datetime(datetimestring, use_dateutil=True):
     """Parse an ISO8601-formatted datetime string and return a datetime object.