Revert "Add a notion of "physical" sysroot, use for remote writing"

This reverts commit 1eff3e8343. There
are a few issues with it.  It's not a critical thing for now, so
let's ugly up the git history and revisit when we have time to
debug it and add more tests.

Besides the below issue, I noticed that the simple `ostree remote add`
now writes to `/ostree/repo/config` because we *aren't* using the
`--sysroot` argument.

Closes: https://github.com/ostreedev/ostree/issues/901

Closes: #902
Approved by: mike-nguyen

tests/admin-test.sh

@@ -232,19 +232,3 @@ curr_rev=$(${CMD_PREFIX} ostree rev-parse --repo=sysroot/ostree/repo testos/buil
 assert_streq ${curr_rev} ${head_rev}
 
 echo "ok upgrade with and without override-commit"
-
-deployment=$(${CMD_PREFIX} ostree admin --sysroot=sysroot --print-current-dir)
-${CMD_PREFIX} ostree --repo=sysroot/ostree/repo --sysroot=sysroot remote add --set=gpg-verify=false remote-test-physical file://$(pwd)/testos-repo
-assert_not_has_file ${deployment}/etc/ostree/remotes.d/remote-test-physical.conf testos-repo
-assert_file_has_content sysroot/ostree/repo/config remote-test-physical
-echo "ok remote add physical sysroot"
-
-# Now a hack...symlink ${deployment}/sysroot to the sysroot in lieu of a bind
-# mount which we can't do in unit tests.
-ln -sr sysroot ${deployment}/sysroot
-ln -s sysroot/ostree ${deployment}/ostree
-ls -al ${deployment}
-${CMD_PREFIX} ostree --repo=sysroot/ostree/repo --sysroot=${deployment} remote add --set=gpg-verify=false remote-test-nonphysical file://$(pwd)/testos-repo
-assert_not_file_has_content sysroot/ostree/repo/config remote-test-nonphysical
-assert_file_has_content ${deployment}/etc/ostree/remotes.d/remote-test-nonphysical.conf testos-repo
-echo "ok remote add nonphysical sysroot"

tests/test-admin-deploy-grub2.sh

@@ -19,7 +19,7 @@
 
 set -euo pipefail
 
-echo "1..18"
+echo "1..16"
 
 . $(dirname $0)/libtest.sh
 

tests/test-admin-deploy-syslinux.sh

@@ -19,7 +19,7 @@
 
 set -euo pipefail
 
-echo "1..18"
+echo "1..16"
 
 . $(dirname $0)/libtest.sh
 

tests/test-admin-deploy-uboot.sh

@@ -20,7 +20,7 @@
 
 set -euo pipefail
 
-echo "1..19"
+echo "1..17"
 
 . $(dirname $0)/libtest.sh