Remove unnecessary util.callable usage

Fixes: #4850

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### Description
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Removes usage of `util.callable`.

### Checklist
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This pull request is:

- [ ] A documentation / typographical error fix
	- Good to go, no issue or tests are needed
- [x] A short code fix
	- please include the issue number, and create an issue if none exists, which
	  must include a complete example of the issue.  one line code fixes without an
	  issue and demonstration will not be accepted.
	- Please include: `Fixes: #<issue number>` in the commit message
	- please include tests.   one line code fixes without tests will not be accepted.
- [ ] A new feature implementation
	- please include the issue number, and create an issue if none exists, which must
	  include a complete example of how the feature would look.
	- Please include: `Fixes: #<issue number>` in the commit message
	- please include tests.

**Have a nice day!**

Closes: #4851
Pull-request: https://github.com/sqlalchemy/sqlalchemy/pull/4851
Pull-request-sha: a0ccdff2cb74f5e944d8baccc269c382b591c8e2

Change-Id: I79918f44becbc5dbefdc7ff65128695c1cabed1d

1 files changed, 5 insertions, 3 deletions

diff --git a/lib/sqlalchemy/orm/attributes.py b/lib/sqlalchemy/orm/attributes.py
index d50eab03e..9d404e00d 100644
--- a/lib/sqlalchemy/orm/attributes.py
+++ b/lib/sqlalchemy/orm/attributes.py
@@ -328,7 +328,7 @@ def create_proxied_attribute(descriptor):
 
         @util.memoized_property
         def comparator(self):
-            if util.callable(self._comparator):
+            if callable(self._comparator):
                 self._comparator = self._comparator()
             if self._adapt_to_entity:
                 self._comparator = self._comparator.adapt_to_entity(
@@ -702,8 +702,10 @@ class AttributeImpl(object):
                 if not passive & CALLABLES_OK:
                     return PASSIVE_NO_RESULT
 
-                if self.accepts_scalar_loader and \
-                        key in state.expired_attributes:
+                if (
+                    self.accepts_scalar_loader
+                    and key in state.expired_attributes
+                ):
                     value = state._load_expired(state, passive)
                 elif key in state.callables:
                     callable_ = state.callables[key]