1Only in PIL.orig: .#Image.py
 2diff -ru PIL.orig/Image.py PIL/Image.py
 3--- PIL.orig/Image.py    2017-07-18 13:45:14.038921762 +0200
 4+++ PIL/Image.py    2017-07-18 13:45:51.208340430 +0200
 5@@ -385,7 +385,6 @@
 6 
 7     for plugin in _plugins:
 8         try:
 9-            logger.debug("Importing %s", plugin)
10             __import__("PIL.%s" % plugin, globals(), locals(), [])
11         except ImportError as e:
12             logger.debug("Image: failed to import %s: %s", plugin, e)
13diff -ru PIL.orig/PngImagePlugin.py PIL/PngImagePlugin.py
14--- PIL.orig/PngImagePlugin.py    2017-07-18 13:45:14.147330406 +0200
15+++ PIL/PngImagePlugin.py    2017-07-18 12:22:16.855209207 +0200
16@@ -127,7 +127,6 @@
17     def call(self, cid, pos, length):
18         "Call the appropriate chunk handler"
19 
20-        logger.debug("STREAM %r %s %s", cid, pos, length)
21         return getattr(self, "chunk_" + cid.decode('ascii'))(pos, length)
22 
23     def crc(self, cid, data):
24@@ -534,7 +533,6 @@
25             except EOFError:
26                 break
27             except AttributeError:
28-                logger.debug("%r %s %s (unknown)", cid, pos, length)
29                 s = ImageFile._safe_read(self.fp, length)
30 
31             self.png.crc(cid, s)