nir/tests: Don't unconditionally log shaders from this one CF test

All of the other tests only log the shader when validation fails, so
having that shader scroll by in the output is very distracting.

Reviewed-by: Caio Oliveira <caio.oliveira@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21289>

src/compiler/nir/tests/control_flow_tests.cpp

@@ -104,13 +104,9 @@ TEST_F(nir_cf_test, delete_break_in_loop)
    EXPECT_TRUE(_mesa_set_search(block_2->predecessors, block_1));
    EXPECT_TRUE(_mesa_set_search(block_3->predecessors, block_2));
 
-   nir_print_shader(b.shader, stderr);
-
    /* Now remove the break. */
    nir_instr_remove(&jump->instr);
 
-   nir_print_shader(b.shader, stderr);
-
    /* At this point, we should have:
     *
     * impl main {