NEWS: purge empty sections

NEWS.md

@@ -280,12 +280,6 @@ rearrangements of Notcurses.
 * 1.6.10 (2020-08-01)
   * The `egc` member of `ncreader_options` is now `const`.
 
-* 1.6.9 (2020-07-26)
-  * No user-visible changes.
-
-* 1.6.8 (2020-07-26)
-  * No user-visible changes.
-
 * 1.6.7 (2020-07-26)
   * GNU libunistring is now required to build/load Notcurses.
   * Added `ncmenu_mouse_selection()`. Escape now closes an unrolled menu
@@ -296,15 +290,9 @@ rearrangements of Notcurses.
     using setuptools. CMake no longer installs it.
   * Added `notcurses_lex_blitter()` and `notcurses_str_scalemode()`.
 
-* 1.6.5 (2020-07-19)
-  * No user-visible changes.
-
 * 1.6.4 (2020-07-19)
   * Added `notcurses_str_blitter()`.
 
-* 1.6.3 (2020-07-16)
-  * No user-visible changes.
-
 * 1.6.2 (2020-07-15)
   * The option `NCOPTION_NO_FONT_CHANGES` has been added. This will cause
     Notcurses to not muck with the current font. Because...
@@ -464,9 +452,6 @@ rearrangements of Notcurses.
   * `qprefix()` and `bprefix()` now take a `uintmax_t` in place of an
     `unsigned`, to match `ncprefix`.
 
-* 1.4.1 (2020-05-11)
-  * No user-visible changes (fixed two unit tests).
-
 * 1.4.0 (2020-05-10)
   * `ncplane_content()` was added. It allows all non-null glyphs of a plane to
     be returned as a nul-terminated, heap-allocated string.
@@ -546,12 +531,6 @@ rearrangements of Notcurses.
     last line will now result in the top line of the plane being lost, all
     other lines moved up one, and the bottom line cleared.
 
-* 1.3.0 (2020-04-12)
-  * No user-visible changes
-
-* 1.2.9 (2020-04-11)
-  * No user-visible changes
-
 * 1.2.8 (2020-04-10)
   * `notcurses-tetris` now happily continues if it can't load its background.