Revert "configure: add #include "version.h" to config.h"

This reverts commit ca21116b3f.

Revert suggested by Jamal:
"Bad secondary effect i just noticed: Every time version.h is changed
 (git pull for example), anything that includes config.h will be
 recompiled. And that means pretty much every single file in the tree.
"

cmdutils.c

@@ -50,6 +50,7 @@
 #include "libavutil/opt.h"
 #include "libavutil/cpu.h"
 #include "cmdutils.h"
+#include "version.h"
 #if CONFIG_NETWORK
 #include "libavformat/network.h"
 #endif