미사용 클래스 삭제 및 컴파일러 경고 수정

Packages/manifest.json

@@ -11,7 +11,6 @@
     "com.unity.multiplayer.center": "1.0.0",
     "com.unity.nuget.newtonsoft-json": "3.2.1",
     "com.unity.profiling.core": "1.0.2",
-    "com.unity.project-auditor": "1.0.1",
     "com.unity.render-pipelines.universal": "17.0.3",
     "com.unity.timeline": "1.8.7",
     "com.unity.ugui": "2.0.0",

Packages/packages-lock.json

@@ -202,16 +202,6 @@
       "dependencies": {},
       "url": "https://packages.unity.com"
     },
-    "com.unity.project-auditor": {
-      "version": "1.0.1",
-      "depth": 0,
-      "source": "registry",
-      "dependencies": {
-        "com.unity.nuget.mono-cecil": "1.10.1",
-        "com.unity.nuget.newtonsoft-json": "3.2.1"
-      },
-      "url": "https://packages.unity.com"
-    },
     "com.unity.render-pipelines.core": {
       "version": "17.0.3",
       "depth": 1,