chore(gpu): let cmux update noise/degree on the c++ side

tfhe/src/integer/gpu/ciphertext/info.rs

@@ -151,21 +151,6 @@ impl CudaRadixCiphertextInfo {
                 .collect(),
         }
     }
-    pub(crate) fn after_if_then_else(&self) -> Self {
-        Self {
-            blocks: self
-                .blocks
-                .iter()
-                .map(|b| CudaBlockInfo {
-                    degree: Degree::new(b.message_modulus.0 - 1),
-                    message_modulus: b.message_modulus,
-                    carry_modulus: b.carry_modulus,
-                    pbs_order: b.pbs_order,
-                    noise_level: NoiseLevel::NOMINAL,
-                })
-                .collect(),
-        }
-    }
     pub(crate) fn after_overflowing_scalar_add_sub(&self) -> Self {
         Self {
             blocks: self

tfhe/src/integer/gpu/mod.rs

@@ -2376,6 +2376,7 @@ pub unsafe fn unchecked_cmux_integer_radix_kb_async<T: UnsignedInteger, B: Numer
         streams.len() as u32,
         std::ptr::addr_of_mut!(mem_ptr),
     );
+    update_noise_degree(radix_lwe_out, &cuda_ffi_radix_lwe_out);
 }
 
 #[allow(clippy::too_many_arguments)]

tfhe/src/integer/gpu/server_key/radix/cmux.rs

@@ -81,8 +81,6 @@ impl CudaServerKey {
                 }
             }
         }
-        result.as_mut().info = true_ct.as_ref().info.after_if_then_else();
-
         result
     }