Read the search replace patterns file differently

Might fix patterns not being recognized on windows

src/calibre/ebooks/conversion/cli.py

@@ -331,14 +331,12 @@ def abspath(x):
 
 
 def read_sr_patterns(path, log=None):
-    import json, re, codecs
+    import json, re
     pats = []
-    with codecs.open(path, 'r', 'utf-8') as f:
+    with open(path, 'rb') as f:
+        lines = f.read().decode('utf-8').splitlines()
     pat = None
-        for line in f.readlines():
+    for line in lines:
-            if line.endswith(u'\n'):
-                line = line[:-1]
-
         if pat is None:
             if not line.strip():
                 continue