Fix typo in comment and remove files that don't exist anymore

theano/compile/ops.py

@@ -450,7 +450,7 @@ def shape_i(var, i, fgraph=None):
                     if inp.owner:
                         recur(inp.owner)
                 # If the output var isn't marked as being in the graph,
-                # we need to att it in the ShapeFeature.
+                # we need to add it in the ShapeFeature.
                 shape_feature.on_import(fgraph, node,
                                         'gof.ops.shape_i')
         if var not in shape_of:

theano/tests/test_flake8.py

@@ -85,12 +85,6 @@ whitelist_flake8 = [
     "sandbox/cuda/__init__.py",
     "sandbox/cuda/tests/__init__.py",
     "sandbox/gpuarray/__init__.py",
-    "sandbox/scan_module/scan_utils.py",
-    "sandbox/scan_module/scan.py",
-    "sandbox/scan_module/scan_op.py",
-    "sandbox/scan_module/__init__.py",
-    "sandbox/scan_module/tests/test_utils.py",
-    "sandbox/scan_module/tests/test_scan.py",
     "sandbox/linalg/ops.py",
     "sandbox/linalg/__init__.py",
     "sandbox/linalg/tests/__init__.py",