chore: remove unnecessary instructions from `insert_wrapping_shift_le…

…ft` (#4038)

# Description

## Problem\*

Resolves <!-- Link to GitHub Issue -->

## Summary\*

This PR just removes some unnecessary instructions which get immediately
optimised out again.

## Additional Context



## Documentation\*

Check one:
- [x] No documentation needed.
- [ ] Documentation included in this PR.
- [ ] **[Exceptional Case]** Documentation to be submitted in a separate
PR.

# PR Checklist\*

- [x] I have tested the changes locally.
- [x] I have formatted the changes with [Prettier](https://prettier.io/)
and/or `cargo fmt` on default settings.

compiler/noirc_evaluator/src/ssa/function_builder/mod.rs

@@ -313,9 +313,7 @@ impl FunctionBuilder {
                 let bit_size_var =
                     self.numeric_constant(FieldElement::from(bit_size as u128), typ.clone());
                 let overflow = self.insert_binary(rhs, BinaryOp::Lt, bit_size_var);
-                let one = self.numeric_constant(FieldElement::one(), Type::unsigned(1));
-                let predicate = self.insert_binary(overflow, BinaryOp::Eq, one);
-                let predicate = self.insert_cast(predicate, typ.clone());
+                let predicate = self.insert_cast(overflow, typ.clone());
                 // we can safely cast to unsigned because overflow_checks prevent bit-shift with a negative value
                 let rhs_unsigned = self.insert_cast(rhs, Type::unsigned(bit_size));
                 let pow = self.pow(base, rhs_unsigned);