Revert "[opaque pointer type] Avoid using PointerType::getElementType for a few cases of CallInst"

This reverts commit r235458.

It looks like this might be breaking something LTO-ish. Looking into it
& will recommit with a fix/test case/etc once I've got more to go on.

llvm-svn: 235533
diff --git a/llvm/lib/AsmParser/LLParser.cpp b/llvm/lib/AsmParser/LLParser.cpp
index 64bf7cd..8e2842b 100644
--- a/llvm/lib/AsmParser/LLParser.cpp
+++ b/llvm/lib/AsmParser/LLParser.cpp
@@ -5223,7 +5223,7 @@
   // Finish off the Attribute and check them
   AttributeSet PAL = AttributeSet::get(Context, Attrs);
 
-  CallInst *CI = CallInst::Create(Ty, Callee, Args);
+  CallInst *CI = CallInst::Create(Callee, Args);
   CI->setTailCallKind(TCK);
   CI->setCallingConv(CC);
   CI->setAttributes(PAL);