Drop compat workaround for unsupported Python 3.2 (#5734)

Author: jdufresne

rest_framework/compat.py

@@ -113,8 +113,7 @@ def distinct(queryset, base):
 try:
     import coreapi
     import uritemplate
-except (ImportError, SyntaxError):
-    # SyntaxError is possible under python 3.2
+except ImportError:
     coreapi = None
     uritemplate = None