Remove the backwards compatibility support for misc_info.txt.

We introduced META/misc_info.txt to hold the misc info since Gingerbread
(commit 37974731fcb4e32b1de5f213d34bd832ca889869). Remove the backwards
compatibility support for building pre-G TF zips.

Test: `m dist` works.
Change-Id: Ibff7aaf69cc7e460634c049d11a004f7196f8f73
1 file changed