Apply suggestions from code review

Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>

Author: serhiy-storchaka

Lib/plistlib.py

@@ -509,11 +509,6 @@ def _get_size(self, tokenL):
         return tokenL
 
     def _read(self, size):
-        if 0:
-            data = self._fp.read(size)
-            if len(data) != size:
-                raise InvalidFileException
-            return data
         cursize = min(size, 1 << 20)
         data = self._fp.read(cursize)
         while True:
@@ -527,8 +522,6 @@ def _read(self, size):
 
     def _read_ints(self, n, size):
         data = self._read(size * n)
-        #print('XXX', n, size)
-        #assert n < 100
         if size in _BINARY_FORMAT:
             return struct.unpack(f'>{n}{_BINARY_FORMAT[size]}', data)
         else: