backend: clean up FacedancerBackend __init__ argument types

The device argument corresponds to the backend device that should be
used when emulating USB devices, not to the device being emulated.

Thus, drop the USBDevice annotation.

Co-developed-by: Andrey Konovalov <andreyknvl@gmail.com>

Author: akvadrako

facedancer/backends/base.py

@@ -3,14 +3,14 @@
 
 
 class FacedancerBackend:
-    def __init__(self, device: USBDevice=None, verbose: int=0, quirks: List[str]=[]):
+    def __init__(self, device=None, verbose: int=0, quirks: List[str]=[]):
         """
         Initializes the backend.
 
         Args:
-            device  :  The device that will act as our Facedancer.   (Optional)
+            device  : The device that will act as our Facedancer.   (Optional)
             verbose : The verbosity level of the given application. (Optional)
-            quirks  :  List of USB platform quirks.                  (Optional)
+            quirks  : List of USB platform quirks.                  (Optional)
         """
         raise NotImplementedError
 

facedancer/backends/hydradancer.py

@@ -57,14 +57,14 @@ class HydradancerHostApp(FacedancerApp, FacedancerBackend):
 
     current_setup_req = None
 
-    def __init__(self, device: USBDevice=None, verbose: int=0, quirks: List[str]=[]):
+    def __init__(self, device=None, verbose: int=0, quirks: List[str]=[]):
         """
         Initializes the backend.
 
         Args:
-            device  :  The device that will act as our Facedancer.   (Optional)
+            device  : The device that will act as our Facedancer.   (Optional)
             verbose : The verbosity level of the given application. (Optional)
-            quirks  :  List of USB platform quirks.                  (Optional)
+            quirks  : List of USB platform quirks.                  (Optional)
         """
         super().__init__(self)
 

facedancer/backends/moondancer.py

@@ -84,7 +84,7 @@ class MoondancerApp(FacedancerApp, FacedancerBackend):
     # Number of supported USB endpoints.
     SUPPORTED_ENDPOINTS = 16
 
-    def __init__(self, device: USBDevice=None, verbose: int=0, quirks: List[str]=[]):
+    def __init__(self, device=None, verbose: int=0, quirks: List[str]=[]):
         """
         Sets up a new Cynthion-backed Facedancer (Moondancer) application.