Remove older toolchains

Drops {1.34.2, 1.43.0, 1.44.0 and 1.45.2}. Only keeps the latest 2
toolchain versions.

Change-Id: I863cbc4d2436ed5e0fac2bdcf8e8ae60cbcf8490
5645 files changed
tree: 8b32bc1b0a32a58a2e0fa12ad4fa269a0b24372a
  1. bootstrap/
  2. darwin-x86/
  3. linux-x86/
  4. Android.bp
  5. OWNERS