delete '-fthinlto-index' in delete_flags (#142)

* test model test

* delete -fthinlto-index flag

* yapf

* pylint

Author: yundiqian

compiler_opt/rl/problem_configuration.py

@@ -113,5 +113,5 @@ def flags_to_add(self) -> Tuple[str, ...]:
   # List of flags to remove from clang compilation command. The flag names
   # should match the actual flags provided to clang.'
   def flags_to_delete(self) -> Tuple[str, ...]:
-    return ('-split-dwarf-file', '-split-dwarf-output', '-fthinlto-index',
-            '-fprofile-sample-use', '-fprofile-remapping-file')
+    return ('-split-dwarf-file', '-split-dwarf-output', '-fprofile-sample-use',
+            '-fprofile-remapping-file')