[SILGen] Gardening: Deleted comment.

Way back in

commit d0bb027
Author: Joe Groff <[email protected]>
Date:   Mon Nov 23 11:47:09 2015 -0800

the convention was changed such that LValues were passed only by box
rather than by box and address.  Delete the comment that says that both
are passed.

Author: nate-chandler

lib/SILGen/SILGenFunction.cpp

@@ -796,8 +796,6 @@ void SILGenFunction::emitCaptures(SILLocation loc,
       assert(!isPack);
 
       auto entryValue = getAddressValue(val, /*forceCopy=*/false);
-      // LValues are captured as both the box owning the value and the
-      // address of the value.
       assert(entryValue->getType().isAddress() &&
              "no address for captured var!");
       // Boxes of opaque return values stay opaque.
@@ -860,8 +858,6 @@ void SILGenFunction::emitCaptures(SILLocation loc,
       assert(!isPack);
 
       auto entryValue = getAddressValue(val, /*forceCopy=*/false);
-      // LValues are captured as both the box owning the value and the
-      // address of the value.
       assert(entryValue->getType().isAddress() &&
              "no address for captured var!");
       // Boxes of opaque return values stay opaque.