Revert "Toolchains: Add Boosted arm-eabi-4.9 and arm-linux-androideabi-4.9"

This reverts commit 88ffb85763ad018d884fccb3ebbacfb0f2dae55c.

Change-Id: I349a35588f5270c8be21658285bfcf6b1cb2e397
Signed-off-by: Hieu Phan <aznrice2k4@gmail.com>