[cts] remove reboot in incremental partial loading progress test

After ag/14293407 the app will get uninstalled when it's installed over
adb and the adb connection gets interrupted before the app is fully
loaded. Therefore, the old test that checks app loading progress after
reboot will no longer work because the app is installed over adb. We
will need to move this test to a gts test that uses a non-adb data
loader.

BUG: 190793258
Test: atest com.android.tests.loadingprogress.host.IncrementalLoadingProgressTest
Change-Id: I32982a38e717e3b68203a6c85cf1e44741c69822
1 file changed