Remove old / unused BlitGLView.
The argv handling code in libuv changed to make assumption about memory layout.
The new code does an assert that the strings pointed to by argv[] are
contiguous in memory.  For "bundled" Plask we build a custom argv[] for libuv,
and so make that comply with the expectation that argv[0] and argv[1] are
back-to-back in memory.