Revert "Add TEST_MAPPING"

This reverts commit 9d6e818c6afbe77b8164e1944a6fe842e127f5a2.

Reason for revert: The previous patch broke TestMappingsValidation.testTestSuiteSetting.

Bug: b/254131591
Change-Id: Ie92e423a3706f6898d4a940e3e3ecef08e208fe9
Test: atest TestMappingsValidation
1 file changed