Revert r221183 to unbreak test-suite on OpenBSD / Bitrig

[Brad Smith]

Revert r221183 to unbreak the test-suite on OpenBSD / Bitrig.

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Index: utils/lit/lit/TestingConfig.py
===================================================================
--- utils/lit/lit/TestingConfig.py	(revision 225505)
+++ utils/lit/lit/TestingConfig.py	(working copy)
@@ -23,8 +23,7 @@
             }
 
         pass_vars = ['LIBRARY_PATH', 'LD_LIBRARY_PATH', 'SYSTEMROOT', 'TERM',
-                     'LD_PRELOAD', 'ASAN_OPTIONS', 'UBSAN_OPTIONS',
-                     'LSAN_OPTIONS']
+                     'ASAN_OPTIONS', 'UBSAN_OPTIONS', 'LSAN_OPTIONS']
         for var in pass_vars:
             environment[var] = os.environ.get(var, '')