Removes git-1.9.0-manifest-msys2.patch as it is already applied upstream
as fe90397604f9f9695b3fa0b8b11d9f93533b655f
Signed-off-by: Christopher Degawa <ccom@randomderp.com>
`git stash` (and possibly other subcommands implemented in shell) sources
`git-sh-setup` which special-cases mingw shells (using `uname`) to request
paths using `pwd -W`. This commit removes this stub as well as another one
for detecting absolute paths.
This change shouldn't affect msys2 shell or cmd, as neither of them presents
as a mingw shell.