lpython.py: no-op for unsigned ints

Author: Shaikh-Ubaid

src/runtime/lpython/lpython.py

@@ -20,10 +20,10 @@
     "i16": int,
     "i32": int,
     "i64": int,
-    "u8": lambda x: x % (2 ** 8),
-    "u16": lambda x: x % (2 ** 16),
-    "u32": lambda x: x % (2 ** 32),
-    "u64": lambda x: x % (2 ** 64),
+    "u8": lambda x: x,
+    "u16": lambda x: x,
+    "u32": lambda x: x,
+    "u64": lambda x: x,
     "f32": float,
     "f64": float,
     "c32": complex,