Remove unsupported section

Author: lukekim

website/docs/reference/sql/prepared_statements.md

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-## Inferred Types
-
-When a parameter type is not explicitly specified in a prepared statement, the type is inferred at execution time based on the provided argument. This approach helps simplify statement definitions and supports flexible query execution.
-
-**SQL Example**
-
-To create a prepared statement named `greater_than` that infers the type of its parameter:
-
-```sql
-PREPARE greater_than AS SELECT * FROM example WHERE a > $1;
-```
-
-To execute the prepared statement with an integer argument:
-
-```sql
-EXECUTE greater_than(20);
-```
-
-**Python Example**
-
-```python
-import adbc_driver_flightsql.dbapi
-
-with adbc_driver_flightsql.dbapi.connect("grpc://localhost:50051") as conn:
-    with conn.cursor() as cur:
-        cur.execute("PREPARE greater_than AS SELECT * FROM example WHERE a > $1;")
-        cur.execute("EXECUTE greater_than(?)", (20,))
-        result = cur.fetchall()
-        print(result)
-```
-
 ## Positional Arguments
 
 Prepared statements can use positional arguments to support multiple parameters. Each parameter is referenced by its position in the statement.