rtable/csp_rtable_cider: Remove malloc.h
rtable/csp_rtable_cider: Remove malloc.h

The commit 1dec9dc6edd8d27 removed the last malloc() from
csp_rtable_cider.c and made it static.  Remove unused header file,
malloc.h, from it.

Signed-off-by: Yasushi SHOJI <afa9ca3be149447780c2f7b524d61ed3d3db63f9@spacecubics.com>

libcsp/libcsp,libcsp/libcsp