Remove unnecessary size limit comment

Implementations generally have DoS limits. We don't need to say this in
the public headers.

Change-Id: I6e69827c551e5ddfab088a566cd165a676529d22
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/97188
Commit-Queue: David Benjamin <davidben@google.com>
Reviewed-by: Rudolf Polzer <rpolzer@google.com>
Auto-Submit: David Benjamin <davidben@google.com>

include/openssl/pem.h

diff --git a/include/openssl/pem.h b/include/openssl/pem.h
index a01d9bf..1a34287 100644
--- a/include/openssl/pem.h
+++ b/include/openssl/pem.h
@@ -38,9 +38,6 @@
 // This library contains functions for reading and writing data encoded in PEM
 // format. This format originated in Privacy-Enhanced Mail (RFC 1421).
 //
-// As an exception to RFC 1421, generally PEM data is limited to 1 GiB by this
-// library. This limit should not affect anyone in practice.
-//
 // TODO(crbug.com/42290574): Finish documenting this header.