Revert "Added code to make trezor-agent work with keepkey."

This reverts commit 53e361b70b.

As requested by @dstanchfield here: https://github.com/trezor/python-trezor/pull/49#issuecomment-183486838

trezorlib/client.py

@@ -346,7 +346,7 @@ class DebugLinkMixin(object):
 
 class ProtocolMixin(object):
     PRIME_DERIVATION_FLAG = 0x80000000
-    VENDORS = ('bitcointrezor.com', 'keepkey.com',)
+    VENDORS = ('bitcointrezor.com',)
 
     def __init__(self, *args, **kwargs):
         super(ProtocolMixin, self).__init__(*args, **kwargs)

trezorlib/transport_hid.py

@@ -8,7 +8,6 @@ from transport import Transport, ConnectionError, NotImplementedException
 DEVICE_IDS = [
 #    (0x10c4, 0xea80),  # TREZOR Shield
     (0x534c, 0x0001),  # TREZOR
-    (0x2b24, 0x0001),  # KeepKey
 ]
 
 class FakeRead(object):