cleaned up some project settings serialised data

ProjectSettings/ProjectSettings.asset

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-    7: UNITY_POST_PROCESSING_STACK_V2
-    13: UNITY_POST_PROCESSING_STACK_V2
-    14: UNITY_POST_PROCESSING_STACK_V2
-    17: UNITY_POST_PROCESSING_STACK_V2
-    18: UNITY_POST_PROCESSING_STACK_V2
-    19: UNITY_POST_PROCESSING_STACK_V2
-    21: UNITY_POST_PROCESSING_STACK_V2
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-    24: UNITY_POST_PROCESSING_STACK_V2
-    25: UNITY_POST_PROCESSING_STACK_V2
-    26: UNITY_POST_PROCESSING_STACK_V2
-    27: UNITY_POST_PROCESSING_STACK_V2
-    28: UNITY_POST_PROCESSING_STACK_V2
-    29: UNITY_POST_PROCESSING_STACK_V2
+    7: 
+    13: 
+    14: 
+    17: 
+    18: 
+    19: 
+    21: 
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