Remove the toolchain package

Author: EmandM

testproject/Packages/manifest.json

@@ -14,7 +14,6 @@
     "com.unity.test-framework": "1.4.6",
     "com.unity.test-framework.performance": "3.0.3",
     "com.unity.timeline": "1.8.7",
-    "com.unity.toolchain.win-x86_64-linux-x86_64": "2.0.10",
     "com.unity.ugui": "2.0.0",
     "com.unity.modules.accessibility": "1.0.0",
     "com.unity.modules.ai": "1.0.0",

testproject/Packages/packages-lock.json

@@ -154,22 +154,6 @@
       },
       "url": "https://packages.unity.com"
     },
-    "com.unity.sysroot": {
-      "version": "2.0.10",
-      "depth": 1,
-      "source": "registry",
-      "dependencies": {},
-      "url": "https://packages.unity.com"
-    },
-    "com.unity.sysroot.linux-x86_64": {
-      "version": "2.0.9",
-      "depth": 1,
-      "source": "registry",
-      "dependencies": {
-        "com.unity.sysroot": "2.0.10"
-      },
-      "url": "https://packages.unity.com"
-    },
     "com.unity.test-framework": {
       "version": "1.4.6",
       "depth": 0,
@@ -203,16 +187,6 @@
       },
       "url": "https://packages.unity.com"
     },
-    "com.unity.toolchain.win-x86_64-linux-x86_64": {
-      "version": "2.0.10",
-      "depth": 0,
-      "source": "registry",
-      "dependencies": {
-        "com.unity.sysroot": "2.0.10",
-        "com.unity.sysroot.linux-x86_64": "2.0.9"
-      },
-      "url": "https://packages.unity.com"
-    },
     "com.unity.transport": {
       "version": "2.4.0",
       "depth": 1,