diff --git a/src/apps/monero/xmr/serialize/base_types.py b/src/apps/monero/xmr/serialize/base_types.py
index dcebd4cd1..30cc0ec4e 100644
--- a/src/apps/monero/xmr/serialize/base_types.py
+++ b/src/apps/monero/xmr/serialize/base_types.py
@@ -1,5 +1,5 @@
 class XmrType:
-    VERSION = 0
+    pass
 
 
 class UVarintType(XmrType):
@@ -12,21 +12,5 @@ class IntType(XmrType):
     VARIABLE = 0
 
 
-class BoolType(IntType):
-    WIDTH = 1
-
-
 class UInt8(IntType):
     WIDTH = 1
-
-
-class UInt32(IntType):
-    WIDTH = 4
-
-
-class UInt64(IntType):
-    WIDTH = 8
-
-
-class SizeT(UInt64):
-    WIDTH = 8
diff --git a/src/apps/monero/xmr/serialize/int_serialize.py b/src/apps/monero/xmr/serialize/int_serialize.py
index e3dfd1eff..a965f6b8d 100644
--- a/src/apps/monero/xmr/serialize/int_serialize.py
+++ b/src/apps/monero/xmr/serialize/int_serialize.py
@@ -74,24 +74,6 @@ def dump_uvarint_b_into(n, buffer, offset=0):
     return buffer
 
 
-def load_uint_b(buffer, width):
-    """
-    Loads fixed size integer from the buffer
-    """
-    result = 0
-    for idx in range(width):
-        result += buffer[idx] << (8 * idx)
-    return result
-
-
-def dump_uint_b(n, width):
-    """
-    Serializes fixed size integer to the buffer
-    """
-    buffer = bytearray(width)
-    return dump_uvarint_b_into(n, buffer, 0)
-
-
 def dump_uint_b_into(n, width, buffer, offset=0):
     """
     Serializes fixed size integer to the buffer