[llvm-objdump] Delete unused forward declarations

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@358416 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvm-objdump/llvm-objdump.h b/tools/llvm-objdump/llvm-objdump.h
index 2211b50..e58d4a0 100644
--- a/tools/llvm-objdump/llvm-objdump.h
+++ b/tools/llvm-objdump/llvm-objdump.h
@@ -24,8 +24,6 @@
 class ELFSectionRef;
 class MachOObjectFile;
 class MachOUniversalBinary;
-class ObjectFile;
-class Archive;
 class RelocationRef;
 }