Remove paragraph about ambiguous grammar (#5905)

Author: Joe-K-Sewell

docs/csharp/language-reference/operators/invocation-operator.md

@@ -27,8 +27,6 @@ In addition to being used to specify the order of operations in an expression, p
 
  For more information, see [Casting and Type Conversions](../../../csharp/programming-guide/types/casting-and-type-conversions.md).  
 
- A cast expression could lead to ambiguous syntax. For example, the expression `(x)–y` could be either interpreted as a cast expression (a cast of –y to type x) or as an additive expression combined with a parenthesized expression, which computes the value x – y.  
-  
  For more information about method invocation, see [Methods](../../../csharp/programming-guide/classes-and-structs/methods.md).  
 
 ## C# Language Specification