Remove odsign_e2e_tests from TEST_MAPPING.

The test is failing in TEST_MAPPING because it takes long to run. We are now running the test as a post submit on git_master. https://android-build.googleplex.com/builds/tests/view?invocationId=I11500009977015563&testResultId=TR12027712961168391

Bug: 193616266
Change-Id: Iaa4c697262a164c193b9176f74c242d6d538b418
Test: Presubmits
1 file changed