delpart: add page (#11135)

Co-authored-by: Lena <126529524+acuteenvy@users.noreply.github.com>
Co-authored-by: Sebastiaan Speck <12570668+sebastiaanspeck@users.noreply.github.com>

pages/linux/delpart.md

@@ -0,0 +1,8 @@
+# delpart
+
+> Ask the Linux kernel to forget about a partition.
+> More information: <https://manned.org/delpart>.
+
+- Tell the kernel to forget about the first partition of `/dev/sda`:
+
+`sudo delpart {{/dev/sda}} {{1}}`