[MLGO] Remove absl dep from libraries

The library files in the new mlgo-utils utilities folder only depend on
absl.logging. The builtin Python logging library is a direct drop-in
replacement here, so we can just change the include and drop the test
dependency.

llvm/utils/mlgo-utils/mlgo/corpus/combine_training_corpus_lib.py

@@ -6,8 +6,7 @@
 import os
 import json
 import glob
-
-from absl import logging
+import logging
 
 _FILE_NAME = "corpus_description.json"
 

llvm/utils/mlgo-utils/mlgo/corpus/extract_ir_lib.py

@@ -11,11 +11,10 @@
 import multiprocessing
 import functools
 import json
+import logging
 
 from typing import Dict, List, Optional
 
-from absl import logging
-
 _UNSPECIFIED_OVERRIDE = ["<UNSPECIFIED>"]
 
 

llvm/utils/mlgo-utils/tests/corpus/combine_training_corpus_test.py

@@ -1,4 +1,4 @@
-# REQUIRES: python-38, absl
+# REQUIRES: python-38
 
 ## Test the functionality of combine_training_corpus_lib
 

llvm/utils/mlgo-utils/tests/corpus/extract_ir_test.py

@@ -1,4 +1,4 @@
-# REQUIRES: python-38, absl
+# REQUIRES: python-38
 
 ## Test the functionality of extract_ir_lib
 

llvm/utils/mlgo-utils/tests/corpus/make_corpus_test.py

@@ -1,4 +1,4 @@
-# REQUIRES: python-38, absl
+# REQUIRES: python-38
 
 ## Test the functionality of make_corpus_lib