Remove old item from NEWSLETTER.txt.

release_docs/NEWSLETTER.txt

@@ -23,14 +23,6 @@ Every entry in RELEASE.txt does NOT require an entry here. The newsletter is
 for communicating major changes that are of interest to anyone. Minor bugfixes,
 memory leak fixes, etc. do not require entries.
 
-    Configuration:
-    -------------
-* Deprecated and removed old SZIP library in favor of LIBAEC library
-
-    LIBAEC library has been used in HDF5 binaries as the szip library of choice
-    for a few years. We removed the options for using the old SZIP library. All
-    current szip and libaec options only work for building the libaec library.
-
 
 * Added support for _Float16 16-bit floating-point datatype