Remove changes files from master that are already in 0297-rc

changes/19974

@@ -1,5 +0,0 @@
-  o Minor bugfixes (unit tests):
-    - Fix tolerances in unit tests for monotonic time comparisons between
-      nanoseconds and microseconds. Previously, we accepted a 10 us
-      difference only, which is not realistic on every platform's
-      clock_gettime(). Fixes bug 19974; bugfix on 0.2.9.1-alpha.

changes/20492

@@ -1,4 +0,0 @@
-  o Minor bugfix (build):
-    - The current Git revision when building from a local repository is now
-      detected correctly when using git worktrees.  Fixes bug 20492; bugfix on
-      0.2.3.9-alpha.

changes/bug19960

@@ -1,4 +0,0 @@
-  o Minor bugfixes (netbsd, unit tests):
-    - Stop expecting NetBSD unit tests to report success for ipfw;
-      on NetBSD, it's only pf that's supported.
-      Part of a fix for bug 19960; bugfix on 0.2.9.5-alpha.

changes/bug20710_025

@@ -1,4 +0,0 @@
-  o Minor bugfixes (memory leak, use-after-free, linux seccomp2 sandbox):
-    - Fix a memory leak and use-after-free error when removing entries
-      from the sandbox's getaddrinfo() cache. Fixes bug 20710; bugfix on
-      0.2.5.5-alpha. Patch from "cypherpunks".

changes/bug20715

@@ -1,4 +0,0 @@
-  o Minor bugfixes (memory leak)
-    - When moving a signed descriptor object from a source to an existing
-      destination, free the allocated memory inside that destination object.
-      Bugfix on tor-0.2.8.3-alpha; Closes #20715.

changes/bug20716

@@ -1,3 +0,0 @@
-  o Minor bugfixes (client, memory leak):
-    - Fix a small memory leak when receiving AF_UNIX connections on
-      a SocksPort. Fixes bug 20716; bugfix on 0.2.6.3-alpha.

changes/bug20810

@@ -1,4 +0,0 @@
-  o Minor bugfixes (relay)
-    - When computing old Tor protocol line version in protover, we were
-      looking at 0.2.7.5 twice instead of a specific case for 0.2.9.1-alpha.
-      Bugfix on tor-0.2.9.4-alpha.

changes/bug20864

@@ -1,4 +0,0 @@
-  o Minor bugfixes (unit tests, hidden services):
-    - Remove a double-free in the single onion service unit test. Stop
-      ignoring a return value. Make future changes less error-prone.
-      Fixes bug 20864; bugfix on 0.2.9.6-rc.

changes/bug20875

@@ -1,4 +0,0 @@
-  o Minor bugfixes (download scheduling)
-    - Resolve a "bug" warning when considering a download schedule whose
-      delay had approached INT_MAX. Fixes 20875; bugfix on 0.2.9.5-alpha.
-

changes/bug20935

@@ -1,3 +0,0 @@
-  o Minor bugfixes (portability):
-    - Use the correct spelling of MAC_OS_X_VERSION_10_12 on configure.ac
-      Fixes bug 20935; bugfix on 0.2.9.6-rc.

changes/geoip-december2016

@@ -1,4 +0,0 @@
-  o Minor features:
-    - Update geoip and geoip6 to the December 7 2016 Maxmind GeoLite2
-      Country database.
-