adt-installer: Drop since its replaced by the extensible SDK

The extensible SDK replaces adt-installer so this can be removed now,
all future effort in this direction will be placed onto that.

This includes a layer version change so the autobuilder knows when to
stop building adt-installer.

[YOCTO #6404]

(From OE-Core rev: c413164c03bdce38f41e63ad2a27dc6108521b9a)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/conf/conf-notes.txt

@@ -2,7 +2,6 @@ Common targets are:
     core-image-minimal
     core-image-sato
     meta-toolchain
-    adt-installer
     meta-ide-support
 
 You can also run generated qemu images with a command like 'runqemu qemux86'

meta/conf/distro/include/distro_alias.inc

@@ -9,7 +9,6 @@
 #
 # Please keep this list in alphabetical order.
 #
-DISTRO_PN_ALIAS_pn-adt-installer = "Intel"
 DISTRO_PN_ALIAS_pn-alsa-state = "OE-Core"
 DISTRO_PN_ALIAS_pn-alsa-utils-alsaconf = "OE-Core"
 DISTRO_PN_ALIAS_pn-alsa-utils-scripts = "OE-Core"

meta/conf/layer.conf

@@ -9,7 +9,7 @@ BBFILE_PRIORITY_core = "5"
 
 # This should only be incremented on significant changes that will
 # cause compatibility issues with other layers
-LAYERVERSION_core = "7"
+LAYERVERSION_core = "8"
 
 BBLAYERS_LAYERINDEX_NAME_core = "openembedded-core"