Remove <isc/cmocka.h>

The last use of the cmocka_add_test_byname() helper macro was removed in
commit 63fe931.  Remove the
<isc/cmocka.h> header that defines it.

Author: kempniu

lib/isc/Makefile.am

@@ -16,7 +16,6 @@ libisc_la_HEADERS =			\
 	include/isc/base32.h		\
 	include/isc/base64.h		\
 	include/isc/buffer.h		\
-	include/isc/cmocka.h		\
 	include/isc/commandline.h	\
 	include/isc/condition.h		\
 	include/isc/counter.h		\

lib/isc/include/isc/cmocka.h

@@ -23,7 +23,8 @@
 
 #define UNIT_TESTING
 
-#include <isc/cmocka.h>
+#include <cmocka.h>
+
 #include <isc/commandline.h>
 #include <isc/hex.h>
 #include <isc/lex.h>