docs: Remove old API changes documentation

Change-Id: I1bc7957121cc7ae27dca04acc3613f4e1858476a

docs: Remove old API changes documentation
9415ec28 · Sean Bright · 3625e915 · 3625e915 · 3625e915
Commit 9415ec28 authored 7 years ago by Sean Bright
--- a/doc/api-1.6.0-changes.odt
+++ b/doc/api-1.6.0-changes.odt
--- a/doc/api-1.6.2-changes.txt
+++ b/doc/api-1.6.2-changes.txt
-PBX changes
-----------
- * If you use ast_build_timing() in your application, you should start calling
-   ast_destroy_timing() upon destruction of the structure, to avoid a memory
-   leak.
-