C#: Make IRConfiguration.qll just forward to the implementation

Just like C++ already does.

Author: Dave Bartolomeo

csharp/ql/src/semmle/code/csharp/ir/IRConfiguration.qll

@@ -1,22 +1 @@
-/**
- * Module used to configure the IR generation process.
- */
-
-import csharp
-
-private newtype TIRConfiguration = MkIRConfiguration()
-private import semmle.code.csharp.ir.internal.IRCSharpLanguage as Language
-
-/**
- * The query can extend this class to control which functions have IR generated for them.
- */
-class IRConfiguration extends TIRConfiguration {
-  string toString() { result = "IRConfiguration" }
-
-  /**
-   * Holds if IR should be created for callable `callable`. By default, holds for all callables.
-   */
-  predicate shouldCreateIRForFunction(Callable callable) { any() }
-
-  predicate shouldEvaluateDebugStringsForFunction(Language::Function func) { any() }
-}
+import implementation.IRConfiguration