[wp] remove memRegion testing

src/plugins/wp/tests/wp_region/oracle/array1.res.oracle

src/plugins/wp/tests/wp_region/oracle/array2.0.dot

src/plugins/wp/tests/wp_region/oracle/array2.res.oracle

src/plugins/wp/tests/wp_region/oracle/array3.0.dot

src/plugins/wp/tests/wp_region/oracle/array3.res.oracle

src/plugins/wp/tests/wp_region/oracle/array4.0.dot

src/plugins/wp/tests/wp_region/oracle/array4.res.oracle

src/plugins/wp/tests/wp_region/oracle/array5.0.dot

src/plugins/wp/tests/wp_region/oracle/array5.res.oracle

src/plugins/wp/tests/wp_region/oracle/array6.0.dot

src/plugins/wp/tests/wp_region/oracle/array6.res.oracle

src/plugins/wp/tests/wp_region/oracle/array7.0.dot

src/plugins/wp/tests/wp_region/oracle/array7.res.oracle

src/plugins/wp/tests/wp_region/oracle/array8.0.dot

src/plugins/wp/tests/wp_region/oracle/array8.res.oracle

src/plugins/wp/tests/wp_region/oracle/diff_annot.txt

src/plugins/wp/tests/wp_region/oracle/fb_ADD.0.dot

src/plugins/wp/tests/wp_region/oracle/fb_ADD.res.oracle

src/plugins/wp/tests/wp_region/oracle/fb_SORT.0.dot

src/plugins/wp/tests/wp_region/oracle/fb_SORT.res.oracle