docs: remote extraneous lines from changelog

CHANGELOG.md

@@ -26,22 +26,6 @@
 *  remove derpy extra changelog bits (445f09f0)
 *  incrementing version number - v2.5.8 (dec0e7de)
 *  update changelog for v2.5.8 (c9cd8975)
-*  incrementing version number - v2.5.7 (5836bf4a)
-*  incrementing version number - v2.5.6 (c7bd7dbf)
-*  incrementing version number - v2.5.5 (3509ed94)
-*  incrementing version number - v2.5.4 (e83260ca)
-*  incrementing version number - v2.5.3 (7e922936)
-*  incrementing version number - v2.5.2 (babcd17e)
-*  incrementing version number - v2.5.1 (ce3aa950)
-*  incrementing version number - v2.5.0 (01d276cb)
-*  incrementing version number - v2.4.5 (dd3e1a28)
-*  incrementing version number - v2.4.4 (d5525c87)
-*  incrementing version number - v2.4.3 (9c647c6c)
-*  incrementing version number - v2.4.2 (3aa7b855)
-*  incrementing version number - v2.4.1 (60cbd148)
-*  incrementing version number - v2.4.0 (4834cde3)
-*  incrementing version number - v2.3.1 (d2425942)
-*  incrementing version number - v2.3.0 (046ea120)
 
 ##### New Features