Remove workaround for UB in cranelift-jit that has been fixed

Author: bjorn3

src/constant.rs

@@ -388,13 +388,7 @@ fn define_all_allocs(tcx: TyCtxt<'_>, module: &mut dyn Module, cx: &mut Constant
         }
 
         let bytes = alloc.inspect_with_uninit_and_ptr_outside_interpreter(0..alloc.len()).to_vec();
-        if bytes.is_empty() {
-            // FIXME(bytecodealliance/wasmtime#7918) cranelift-jit has a bug where it causes UB on
-            // empty data objects
-            data.define(Box::new([0]));
-        } else {
-            data.define(bytes.into_boxed_slice());
-        }
+        data.define(bytes.into_boxed_slice());
 
         for &(offset, prov) in alloc.provenance().ptrs().iter() {
             let alloc_id = prov.alloc_id();