Remove unused code (and golf)

implementations/python/preserves/iolist.py

@@ -11,41 +11,20 @@ class CountedIOList:
         self.length = len(i)
 
 def counted(i):
-    if isinstance(i, CountedIOList): return i
-    return CountedIOList(i)
-
-def withbyte(i, b):
-    if i is None:
-        return b
-    elif isinstance(i, list):
-        i.append(b)
-        return i
-    else:
-        return [i, b]
+    return i if isinstance(i, CountedIOList) else CountedIOList(i)
 
 _len = len
 
-def join(*iolists):
-    if _len(iolists) == 0:
-        return None
-    if _len(iolists) == 1:
-        return iolists[0]
-    return list(iolists)
-
 def len(i):
-    if i is None:
-        return 0
-    if isinstance(i, int):
-        return 1
-    if isinstance(i, _bytes):
-        return _len(i)
+    if i is None: return 0
+    if isinstance(i, int): return 1
+    if isinstance(i, _bytes): return _len(i)
     if isinstance(i, list):
         acc = 0
         for j in i:
             acc = acc + len(j)
         return acc
-    if isinstance(i, CountedIOList):
-        return i.length
+    if isinstance(i, CountedIOList): return i.length
     raise ValueError('invalid iolist: ' + repr(i) + ' ' + repr(type(i)))
 
 _bytes = bytes
@@ -53,8 +32,7 @@ _bytes = bytes
 def bytes(i):
     buffer = bytearray(len(i))
     def fill(i, offset):
-        while isinstance(i, CountedIOList):
-            i = i.value
+        while isinstance(i, CountedIOList): i = i.value
         if i is None:
             return offset
         if isinstance(i, int):