Removed mathematics dependency for SRP Core package

Author: kirill-titov-u

Packages/com.unity.render-pipelines.core/package.json

@@ -6,7 +6,6 @@
   "displayName": "Scriptable Render Pipeline Core",
   "dependencies": {
     "com.unity.burst": "1.8.14",
-    "com.unity.mathematics": "1.3.2",
     "com.unity.collections": "2.4.3",
     "com.unity.modules.terrain": "1.0.0",
     "com.unity.modules.jsonserialize": "1.0.0"