chore: remove unnecessary @as calls

src/cpu/thumb/branch.zig

@@ -47,7 +47,7 @@ pub fn format19(comptime is_low: bool) InstrFn {
                 cpu.r[14] = old_pc | 1;
             } else {
                 // Instruction 1
-                cpu.r[14] = (cpu.r[15] + 2) +% (u32SignExtend(11, @as(u32, offset)) << 12);
+                cpu.r[14] = (cpu.r[15] + 2) +% (u32SignExtend(11, offset) << 12);
             }
         }
     }.inner;