Drop dunfell support

Drop dunfell support from the master branch in anticipation of the
gatestgarth release.  All dunfell users should reference the dunfell
branch.

Change-Id: I9c5806f698cca42773aaea1fb49e0dfff437eaf4
Signed-off-by: Jon Mason <jon.mason@arm.com>

meta-arm-autonomy/conf/layer.conf

@@ -16,7 +16,7 @@ LAYERDEPENDS_meta-arm-autonomy = " \
    openembedded-layer \
    virtualization-layer \
 "
-LAYERSERIES_COMPAT_meta-arm-autonomy = "dunfell gatesgarth"
+LAYERSERIES_COMPAT_meta-arm-autonomy = "gatesgarth"
 
 # We don't activate virtualization feature from meta-virtualization as it
 # brings in lots of stuff we don't need. We need to disable the sanity check

meta-arm-bsp/conf/layer.conf

@@ -10,4 +10,4 @@ BBFILE_PATTERN_meta-arm-bsp = "^${LAYERDIR}/"
 BBFILE_PRIORITY_meta-arm-bsp = "6"
 
 LAYERDEPENDS_meta-arm-bsp = "core meta-arm meta-kernel"
-LAYERSERIES_COMPAT_meta-arm-bsp = "dunfell gatesgarth"
+LAYERSERIES_COMPAT_meta-arm-bsp = "gatesgarth"

meta-arm-toolchain/conf/layer.conf

@@ -12,7 +12,7 @@ BBFILE_PRIORITY_arm-toolchain = "30"
 LICENSE_PATH += "${LAYERDIR}/custom-licenses"
 
 LAYERDEPENDS_arm-toolchain = "core"
-LAYERSERIES_COMPAT_arm-toolchain = "dunfell gatesgarth"
+LAYERSERIES_COMPAT_arm-toolchain = "gatesgarth"
 
 # do not error out on bbappends for missing recipes
 BB_DANGLINGAPPENDS_WARNONLY = "true"

meta-arm/conf/layer.conf

@@ -13,4 +13,4 @@ LAYERDEPENDS_meta-arm = " \
     core \
     arm-toolchain \
 "
-LAYERSERIES_COMPAT_meta-arm = "dunfell gatesgarth"
+LAYERSERIES_COMPAT_meta-arm = "gatesgarth"

meta-gem5/conf/layer.conf

@@ -10,4 +10,4 @@ BBFILE_PATTERN_meta-gem5 = "^${LAYERDIR}/"
 BBFILE_PRIORITY_meta-gem5 = "6"
 
 LAYERDEPENDS_meta-gem5 = "core openembedded-layer"
-LAYERSERIES_COMPAT_meta-gem5 = "dunfell gatesgarth"
+LAYERSERIES_COMPAT_meta-gem5 = "gatesgarth"