Cleanup naming and remove tf dependency

Author: jimfleming

pyoneer/rl/strategies/mode_strategy_impl.py

@@ -15,5 +15,5 @@ def __init__(self, policy):
         self.policy = policy
 
     def __call__(self, *args, **kwargs):
-        policy = self.policy(*args, **kwargs)
-        return policy.mode()
+        dist = self.policy(*args, **kwargs)
+        return dist.mode()

pyoneer/rl/strategies/sample_strategy_impl.py

@@ -15,5 +15,5 @@ def __init__(self, policy):
         self.policy = policy
 
     def __call__(self, *args, **kwargs):
-        policy = self.policy(*args, **kwargs)
-        return policy.sample()
+        dist = self.policy(*args, **kwargs)
+        return dist.sample()

setup.py

@@ -6,7 +6,6 @@
 
 REQUIRED_PACKAGES = [
     'gym',
-    'tensorflow',
     'tensorflow-probability',
 ]