Revert of [telemetry] Script for finding all Telemetry dependencies.

tools/perf/run_tests

Index: tools/perf/run_tests
diff --git a/tools/perf/run_tests b/tools/perf/run_tests
index c1c203db9c790d8f8c28edf3fea2601c329b7e66..77a5366647e7cb6bd9fd0d7ae86ed2e0bf69455a 100755
--- a/tools/perf/run_tests
+++ b/tools/perf/run_tests
@@ -11,14 +11,13 @@
 import os
 import sys
 
-sys.path.append(os.path.join(
-  os.path.dirname(os.path.realpath(__file__)), os.pardir, 'telemetry'))
+sys.path.append(os.path.join(os.path.dirname(__file__), os.pardir, 'telemetry'))
 from telemetry.unittest import gtest_testrunner
 from telemetry.unittest import run_tests
 
 
 if __name__ == '__main__':
-  top_level_dir = os.path.abspath(os.path.dirname(os.path.realpath(__file__)))
+  top_level_dir = os.path.abspath(os.path.dirname(__file__))
   runner = gtest_testrunner.GTestTestRunner(print_result_after_run=False)
   ret = run_tests.Main(sys.argv[1:], top_level_dir, top_level_dir, runner)