Revert "[DWARF5]Addition of alignment atrribute in typedef DIE."

This reverts commit 423f541c1a322963cf482683fe9777ef0692082d, which
breaks llvm-c ABI.
diff --git a/clang/lib/CodeGen/CGDebugInfo.cpp b/clang/lib/CodeGen/CGDebugInfo.cpp
index f204b97..75c4b2a 100644
--- a/clang/lib/CodeGen/CGDebugInfo.cpp
+++ b/clang/lib/CodeGen/CGDebugInfo.cpp
@@ -1127,8 +1127,7 @@
   SourceLocation Loc = AliasDecl->getLocation();
   return DBuilder.createTypedef(Src, OS.str(), getOrCreateFile(Loc),
                                 getLineNumber(Loc),
-                                getDeclContextDescriptor(AliasDecl),
-                                /* Alignment */ None);
+                                getDeclContextDescriptor(AliasDecl));
 }
 
 llvm::DIType *CGDebugInfo::CreateType(const TypedefType *Ty,
@@ -1144,10 +1143,9 @@
   SourceLocation Loc = Ty->getDecl()->getLocation();
 
   // Typedefs are derived from some other type.
-  return DBuilder.createTypedef(
-      Underlying, Ty->getDecl()->getName(), getOrCreateFile(Loc),
-      getLineNumber(Loc), getDeclContextDescriptor(Ty->getDecl()),
-      getDeclAlignIfRequired(Ty->getDecl(), CGM.getContext()));
+  return DBuilder.createTypedef(Underlying, Ty->getDecl()->getName(),
+                                getOrCreateFile(Loc), getLineNumber(Loc),
+                                getDeclContextDescriptor(Ty->getDecl()));
 }
 
 static unsigned getDwarfCC(CallingConv CC) {
@@ -2326,8 +2324,7 @@
   return DBuilder.createTypedef(
       getOrCreateType(Ty->getDecl()->getUnderlyingType(), Unit),
       Ty->getDecl()->getName(), getOrCreateFile(Loc), getLineNumber(Loc),
-      getDeclContextDescriptor(Ty->getDecl()),
-      /* Alignment */ None);
+      getDeclContextDescriptor(Ty->getDecl()));
 }
 
 /// \return true if Getter has the default name for the property PD.