Revert "PYTHON-4672 Add Projection with aggregation expressions example"

This reverts commit 329e0aa.

Author: blink1073

test/test_examples.py

@@ -866,37 +866,6 @@ def test_aggregate_examples(self):
         )
         # End Aggregation Example 4
 
-    def test_aggregate_projection_example(self):
-        db = self.db
-
-        # Start Aggregation Projection Example 1
-        db.inventory.find(
-            {},
-            {
-                "_id": 0,
-                "item": 1,
-                "status": {
-                    "$switch": {
-                        "branches": [
-                            {"case": {"$eq": ["$status", "A"]}, "then": "Available"},
-                            {"case": {"$eq": ["$status", "D"]}, "then": "Discontinued"},
-                        ],
-                        "default": "No status found",
-                    }
-                },
-                "area": {
-                    "$concat": [
-                        {"$toString": {"$multiply": ["$size.h", "$size.w"]}},
-                        " ",
-                        "$size.uom",
-                    ]
-                },
-                "reportNumber": {"$literal": 1},
-            },
-        )
-
-        # End Aggregation Projection Example 1
-
     def test_commands(self):
         db = self.db
         db.restaurants.insert_one({})