gitlab-ci: Remove SCons differences.

There's still a reference in .gitlab-ci/container/x86_build-base.sh to
scons apt package, but I don't have confidence to revise .gitlab-ci.yml
myself, and it should be harmless.
106 jobs for !9743 with gitlab-ci-scons-remove in 2 minutes and 6 seconds (queued for 7 seconds)
latest detached
Status Job ID Name Coverage
  Sanity
passed #8184006
sanity

00:00:08

 
  Container
manual #8184009
aarch64 manual
arm_build
manual #8184010
manual
arm_test-base
manual #8184011
windows shell 1809 mesa manual
windows_build_vs2019
manual #8184007
manual
x86_build-base
manual #8184008
manual
x86_test-base
 
  Container 2
created #8184019
android_build
created #8184022
arm64_test
created #8184023
armhf_test
created #8184016
i386_build
created #8184012
kernel+rootfs_amd64
created #8184013
aarch64
kernel+rootfs_arm64
created #8184014
aarch64
kernel+rootfs_armhf
created #8184017
ppc64el_build
created #8184018
s390x_build
created #8184015
x86_build
created #8184020
x86_test-gl
created #8184021
x86_test-vk
 
  Meson X86 64
created #8184029
meson-clang
created #8184030
meson-clover
created #8184026
meson-clover-testing
created #8184027
meson-gallium
created #8184028
meson-release
created #8184024
meson-testing
created #8184025
meson-testing-asan
created #8184031
meson-vulkan
 
  Build Misc
created #8184032
meson-android
created #8184034
aarch64
meson-arm64
created #8184035
aarch64
meson-arm64-asan
created #8184036
aarch64
meson-arm64-build-test
created #8184033
aarch64
meson-armhf
created #8184038
meson-i386
created #8184041
meson-mingw32-x86_64
created #8184040
kvm
meson-ppc64el
created #8184039
kvm
meson-s390x
created #8184037
windows docker 1809 mesa
meson-windows-vs2019
 
  Amd
created #8184042
radv-fossils
 
  Broadcom
created #8184053
igalia-rpi4
v3d-rpi4-gles2:armhf
created #8184047
igalia-rpi4
v3d-rpi4-gles31:armhf 1/2
created #8184048
igalia-rpi4
v3d-rpi4-gles31:armhf 2/2
created #8184049
igalia-rpi4
v3d-rpi4-gles3:armhf 1/4
created #8184050
igalia-rpi4
v3d-rpi4-gles3:armhf 2/4
created #8184051
igalia-rpi4
v3d-rpi4-gles3:armhf 3/4
created #8184052
igalia-rpi4
v3d-rpi4-gles3:armhf 4/4
created #8184054
igalia-rpi4
v3dv-rpi4-vk:armhf 1/6
created #8184055
igalia-rpi4
v3dv-rpi4-vk:armhf 2/6
created #8184056
igalia-rpi4
v3dv-rpi4-vk:armhf 3/6
created #8184057
igalia-rpi4
v3dv-rpi4-vk:armhf 4/6
created #8184058
igalia-rpi4
v3dv-rpi4-vk:armhf 5/6
created #8184059
igalia-rpi4
v3dv-rpi4-vk:armhf 6/6
created #8184043
igalia-rpi3
vc4-rpi3-gles2:armhf 1/4
created #8184044
igalia-rpi3
vc4-rpi3-gles2:armhf 2/4
created #8184045
igalia-rpi3
vc4-rpi3-gles2:armhf 3/4
created #8184046
igalia-rpi3
vc4-rpi3-gles2:armhf 4/4
 
  Freedreno
created #8184060
google-freedreno-db410c
a306_gles2
created #8184061
google-freedreno-db410c
a306_gles3 1/3
created #8184062
google-freedreno-db410c
a306_gles3 2/3
created #8184063
google-freedreno-db410c
a306_gles3 3/3
created #8184064
google-freedreno-db410c
a306_gles3_options
created #8184065
google-freedreno-db820c
a530_gles2
created #8184068
google-freedreno-db820c
a530_gles31 1/2
created #8184066
google-freedreno-db820c
a530_gles3 1/2
created #8184069
google-freedreno-db820c
a530_gles31 2/2
created #8184067
google-freedreno-db820c
a530_gles3 2/2
created #8184070
google-freedreno-db820c
a530_piglit_gl
created #8184071
google-freedreno-db820c
a530_piglit_shader
created #8184075
google-freedreno-cheza
a630_gl
created #8184072
google-freedreno-cheza
a630_gles2
created #8184074
google-freedreno-cheza
a630_gles3
created #8184073
google-freedreno-cheza
a630_gles31
created #8184077
google-freedreno-cheza
a630_gles_asan
created #8184076
google-freedreno-cheza
a630_gles_others
created #8184081
google-freedreno-cheza
a630_piglit_gl
created #8184082
google-freedreno-cheza
a630_piglit_shader
created #8184083
google-freedreno-cheza
a630-traces
created #8184078
google-freedreno-cheza
a630_vk 1/2
created #8184079
google-freedreno-cheza
a630_vk 2/2
created #8184080
google-freedreno-cheza
a630_vk_sysmem
 
  Software Renderer
created #8184097
lavapipe-vk
created #8184089
llvmpipe-gles2
created #8184084
llvmpipe-piglit-cl
created #8184086
llvmpipe-piglit-glslparser
created #8184085
llvmpipe-piglit-quick_gl
created #8184087
llvmpipe-piglit-quick_shader
created #8184088
llvmpipe-traces
created #8184094
softpipe-asan-gles31
created #8184096
softpipe-gl
created #8184090
softpipe-gles2
created #8184091
softpipe-gles3
created #8184092
softpipe-gles31 1/2
created #8184093
softpipe-gles31 2/2
created #8184095
softpipe-piglit-quick
 
  Layered Backends
created #8184110
windows docker 1809 mesa
test-d3d12-windows
created #8184102
virgl-gl30-on-gl
created #8184103
virgl-gl31-on-gl
created #8184104
virgl-gl32-on-gl
created #8184098
virgl-gles2-on-gl
created #8184100
virgl-gles31-on-gl 1/2
created #8184101
virgl-gles31-on-gl 2/2
created #8184099
virgl-gles3-on-gl
created #8184105
virgl-traces
created #8184109
zink-lvp-gl
created #8184107
zink-lvp-gles2
created #8184108
zink-lvp-gles3
created #8184106
zink-piglit-quick_gl
 
  Deploy
passed #8184111
test-docs-mr

00:01:57