extra-build-config.md: Update docs as per SDIMG_COMPRESSION removal
Using SDIMG_COMPRESSION variable to choose compression type for
produced images is deprecated. IMAGE_FSTYPES should be used instead.
This patch removes any reference to SDIMG_COMPRESSION variable
within the build documentation.
@@ -13,9 +13,6 @@ specific to it. For the rest please check:
2. Overwrite SDIMG_ROOTFS_TYPE in local.conf
* `SDIMG_ROOTFS_TYPE = "ext3.xz"`
-3. Overwrite SDIMG_COMPRESSION in local.conf
- * `SDIMG_COMPRESSION = "xz"`
-
Accommodate the values above to your own needs (ex: ext3 / ext4).
## GPU memory
