Revert "Implement a rudimentary form of generic lambdas."

This reverts commit 606f5d7a99b11957e057e4cd1f55f931f66a42c7.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@189004 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CodeGenFunction.cpp b/lib/CodeGen/CodeGenFunction.cpp
index c271d7c..da8db17 100644
--- a/lib/CodeGen/CodeGenFunction.cpp
+++ b/lib/CodeGen/CodeGenFunction.cpp
@@ -700,7 +700,7 @@
     EmitLambdaToBlockPointerBody(Args);
   } else if (isa<CXXMethodDecl>(FD) &&
              cast<CXXMethodDecl>(FD)->isLambdaStaticInvoker()) {
-    // The lambda static invoker function is special, because it forwards or
+    // The lambda "__invoke" function is special, because it forwards or
     // clones the body of the function call operator (but is actually static).
     EmitLambdaStaticInvokeFunction(cast<CXXMethodDecl>(FD));
   } else if (FD->isDefaulted() && isa<CXXMethodDecl>(FD) &&