Remove param doc for mlt_slices_count().
Remove param doc for mlt_slices_count().

mltframework/mlt,mltframework/mlt,j-b-m/mlt,j-b-m/mlt,mltframework/mlt,j-b-m/mlt,siddharudh/mlt,j-b-m/mlt,mltframework/mlt,siddharudh/mlt,j-b-m/mlt,mltframework/mlt,mltframework/mlt,siddharudh/mlt,mltframework/mlt,mltframework/mlt,siddharudh/mlt,siddharudh/mlt,mltframework/mlt,j-b-m/mlt,j-b-m/mlt,siddharudh/mlt,siddharudh/mlt,mltframework/mlt,siddharudh/mlt,siddharudh/mlt,j-b-m/mlt,j-b-m/mlt,j-b-m/mlt