lact: disable undervolt

hosts/yarn/lact.nix

@@ -27,14 +27,6 @@ in
       };
       apply_settings_timer = 5;
       gpus.${gpuId} = {
-        # ASRock RX 7800 XT (Navi 32). Voltage offset tuned via sweep with
-        # clpeak under perf=high (sustained DPM7); visible artifacting on the
-        # display engine appeared at -300 mV, so this sits 75 mV below that
-        # cliff for a real-world safety margin (cool clpeak < hot gaming).
-        voltage_offset = -120; # mV; kernel range on this card: -450..0
-        max_core_clock = 2400; # MHz; default boost ~2520
-        power_cap = 200.0; # W; default 220, max 280
-        performance_level = "auto";
       };
     };
   };