Pack: Fixup to version history.

Change-Id: Ib05bf03c662914350c016d1a7da3a8ae90bd2f6f

Author: JonatanAntoni

ARM.CMSIS.pdsc

@@ -9,7 +9,6 @@
 
   <releases>
     <release version="5.6.0" date="2019-07-10">
-      Active development...
       CMSIS-Core(M): 5.3.0 (see revision history for details)
        - Added provisions for compiler-independent C startup code.
       CMSIS-Core(A): 1.1.4 (see revision history for details)