fix: Remove extra brace from rms_norm.rs

✅ Phase 3.4 COMPLETE - All normalization files compiling!

Author: BiomeOS Developer

showcase/gpu-universal/ml-inference/src/wgpu/normalization/rms_norm.rs

@@ -144,4 +144,3 @@ impl WgpuExecutor {
     }
 
 }
-}