bblayers.conf.sample: Remove meta-linaro
bblayers.conf.sample: Remove meta-linaro

Remove meta-linaro to make external-xilinx tcmode as primary deliver for
building eSDK

Signed-off-by: Manjukumar Matha <4c64a17569570cb9f1048973bce031c402b55312@xilinx.com>

Xilinx/meta-petalinux,Xilinx/meta-petalinux,Xilinx/meta-petalinux,Xilinx/meta-petalinux,Xilinx/meta-petalinux,Xilinx/meta-petalinux