Remove IntegerLiteralExprSyntax.Radix conformance to CaseIterable

There’s no good reason why you would want to iterate over all radix kinds.

Author: ahoppen

Release Notes/511.md

@@ -19,6 +19,9 @@
 - `SyntaxKind` removed conformance to `CaseIterable`
   - Description: `SyntaxKind` no longer conforms to `CaseIterable` since there is no good use case to iterate over all syntax kinds. 
   - Pull request: 
+- `IntegerLiteralExprSyntax.Radix` removed conformance to `CaseIterable`
+  - Description: `IntegerLiteralExprSyntax.Radix` no longer conforms to `CaseIterable` since there is no good use case to iterate over all radix kinds. 
+  - Pull request: 
 
 
 ## Template

Sources/SwiftRefactor/IntegerLiteralUtilities.swift

@@ -13,7 +13,7 @@
 import SwiftSyntax
 
 extension IntegerLiteralExprSyntax {
-  public enum Radix: CaseIterable {
+  public enum Radix {
     case binary
     case octal
     case decimal