[lit][NFC] not check stdout in googletest-timeout.py

This is flicky for buildbots (for example, https://lab.llvm.org/buildbot/#/builders/188/builds/21560)
because of the short timeout. The test coverage is not reduced because
the stdout check is performed in other googtest-* unit tests.

Author: Yuanfang Chen

llvm/utils/lit/tests/Inputs/googletest-timeout/DummySubDir/OneTest.py

@@ -54,8 +54,6 @@
             f.write(output)
         exit_code = 0
     elif test_name == 'InfiniteLoopSubTest':
-        print('[ RUN      ] T.InfiniteLoopSubTest', flush=True)
-        print('some in progess output', file=sys.stderr, flush=True)
         while True:
             pass
     else:

llvm/utils/lit/tests/googletest-timeout.py

@@ -26,8 +26,6 @@
 # CHECK-INF-NEXT: GTEST_OUTPUT=json:{{[^[:space:]]*}} GTEST_SHUFFLE=0 GTEST_TOTAL_SHARDS=2 GTEST_SHARD_INDEX=0 {{.*}}[[FILE]]
 # CHECK-INF-NEXT: --
 # CHECK-INF-EMPTY:
-# CHECK-INF-NEXT: [ RUN ] T.InfiniteLoopSubTest
-# CHECK-INF-NEXT: some in progess output
 # CHECK-INF-EMPTY:
 # CHECK-INF-NEXT: --
 # CHECK-INF-NEXT: exit: