Remove redundant call. (#7156)

Assisted-by: Gemini via Antigravity

toolchain/check/return.cpp

@@ -181,8 +181,7 @@ auto BuildReturnWithExpr(Context& context, SemIR::LocId loc_id,
           expr_id = SemIR::ErrorInst::InstId;
           break;
         }
-        auto call_params = context.inst_blocks().Get(
-            GetCurrentFunctionForReturn(context).call_params_id);
+        auto call_params = context.inst_blocks().Get(function.call_params_id);
         if (function.call_param_ranges.return_size() == 0) {
           out_param_id = SemIR::InstId::None;
           break;