britney.py: Remove some redundant if-statements

Signed-off-by: Niels Thykier <niels@thykier.net>

britney.py

@@ -261,8 +261,7 @@ class Britney(object):
                 return
 
         # read the source and binary packages for the involved distributions
-        if 'testing' not in self.sources:
-            self.sources['testing'] = self.read_sources(self.options.testing)
+        self.sources['testing'] = self.read_sources(self.options.testing)
         self.sources['unstable'] = self.read_sources(self.options.unstable)
         self.sources['tpu'] = self.read_sources(self.options.tpu)
 
@@ -271,15 +270,13 @@ class Britney(object):
         else:
             self.sources['pu'] = {}
 
-        if 'testing' not in self.binaries:
-            self.binaries['testing'] = {}
+        self.binaries['testing'] = {}
         self.binaries['unstable'] = {}
         self.binaries['tpu'] = {}
         self.binaries['pu'] = {}
 
         for arch in self.options.architectures:
-            if arch not in self.binaries['testing']:
-                self.binaries['testing'][arch] = self.read_binaries(self.options.testing, "testing", arch)
+            self.binaries['testing'][arch] = self.read_binaries(self.options.testing, "testing", arch)
             self.binaries['unstable'][arch] = self.read_binaries(self.options.unstable, "unstable", arch)
             self.binaries['tpu'][arch] = self.read_binaries(self.options.tpu, "tpu", arch)
             if hasattr(self.options, 'pu'):