Lightly edit changelog

Remove the "documentation" section, since a comment-only change
doesn't usually get a changelog entry.

ChangeLog

@@ -17,11 +17,6 @@ Changes in version 0.3.4.2-alpha - 2018-06-12
     - Update geoip and geoip6 to the June 7 2018 Maxmind GeoLite2
       Country database. Closes ticket 26351.
-  o Minor bugfixes (C correctness):
-    - Avoid casting return value of smartlist_len() to double as
-      compiler does not like it when -Wbad-function-cast is on. Fixes
-      bug 26283; bugfix on 0.2.4.10-alpha.
-
   o Minor bugfixes (compatibility, openssl):
     - Work around a change in OpenSSL 1.1.1 where return values that
       would previously indicate "no password" now indicate an empty
@@ -30,10 +25,13 @@ Changes in version 0.3.4.2-alpha - 2018-06-12
       would reject. Fixes bug 26116; bugfix on 0.2.5.16.
   o Minor bugfixes (compilation):
-    - Silence unused-const-variable warnings in zstd.h on some gcc
+    - Silence unused-const-variable warnings in zstd.h with some GCC
       versions. Fixes bug 26272; bugfix on 0.3.1.1-alpha.
-    - Fix compilation when building with OpenSSL 1.1.0 with the "no-
-      deprecated" flag enabled. Fixes bug 26156; bugfix on 0.3.4.1-alpha.
+    - Fix compilation when using OpenSSL 1.1.0 with the "no-deprecated"
+      flag enabled. Fixes bug 26156; bugfix on 0.3.4.1-alpha.
+    - Avoid a compiler warning when casting the return value of
+      smartlist_len() to double with DEBUG_SMARTLIST enabled. Fixes bug
+      26283; bugfix on 0.2.4.10-alpha.
   o Minor bugfixes (control port):
     - Do not count 0-length RELAY_COMMAND_DATA cells as valid data in
@@ -61,11 +59,6 @@ Changes in version 0.3.4.2-alpha - 2018-06-12
       from its output. Fixes bugs 26101 and 26102; bugfix
       on 0.2.5.1-alpha.
-  o Documentation:
-    - In code comment, point the reader to the exact section in Tor
-      specification that specifies circuit close error code values.
-      Resolves ticket 25237.
-
 Changes in version 0.3.3.6 - 2018-05-22
   Tor 0.3.3.6 is the first stable release in the 0.3.3 series. It