[clang][bytecode][NFC] Remove a useless cast

getDecl() now always returns a ValueDecl.

clang/lib/AST/ByteCode/MemberPointer.cpp

diff --git a/clang/lib/AST/ByteCode/MemberPointer.cpp b/clang/lib/AST/ByteCode/MemberPointer.cpp
index 0fe94db..dfc8583 100644
--- a/clang/lib/AST/ByteCode/MemberPointer.cpp
+++ b/clang/lib/AST/ByteCode/MemberPointer.cpp
@@ -79,7 +79,7 @@
   if (hasBase())
     return Base.toAPValue(ASTCtx);
 
-  return APValue(cast<ValueDecl>(getDecl()), /*IsDerivedMember=*/false,
+  return APValue(getDecl(), /*IsDerivedMember=*/false,
                  /*Path=*/{});
 }