treewide: linux: remove cfg files from SRC_URI

When using a `feature.scc` file it is not necessary to also include
the corresponding `feature.cfg` file in the `SRC_URI` field.  Remove
them to clean up.

[1]: https://docs.yoctoproject.org/kernel-dev/advanced.html#recipe-space-metadata

Tested:

Built on Yosemite4 and observed MCTP configure options are still
enabled.
```
 root@yosemite4:~# zcat /proc/config.gz  | grep MCTP
 CONFIG_MCTP=y
 CONFIG_MCTP_FLOWS=y
 # MCTP Device Drivers
 CONFIG_MCTP_SERIAL=y
 CONFIG_MCTP_TRANSPORT_I2C=y
 # end of MCTP Device Drivers
```

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I76656cf9fbbe5cd2ac44f90c46b391111ca72410
diff --git a/meta-facebook/recipes-kernel/linux/linux-aspeed_%.bbappend b/meta-facebook/recipes-kernel/linux/linux-aspeed_%.bbappend
index 81d3132..cb3fb3f 100644
--- a/meta-facebook/recipes-kernel/linux/linux-aspeed_%.bbappend
+++ b/meta-facebook/recipes-kernel/linux/linux-aspeed_%.bbappend
@@ -2,7 +2,6 @@
 
 SRC_URI:append:mf-fb-secondary-emmc = " \
     file://emmc-btrfs.scc \
-    file://emmc-btrfs.cfg \
     "
 
 KERNEL_FEATURES:append:mf-fb-secondary-emmc = " \
diff --git a/meta-phosphor/recipes-kernel/linux/linux-%.bbappend b/meta-phosphor/recipes-kernel/linux/linux-%.bbappend
index 9908302..1e00815 100644
--- a/meta-phosphor/recipes-kernel/linux/linux-%.bbappend
+++ b/meta-phosphor/recipes-kernel/linux/linux-%.bbappend
@@ -4,5 +4,4 @@
         "
 SRC_URI:append:df-mctp = " \
         file://mctp/mctp.scc \
-        file://mctp/mctp.cfg \
         "