Remove unwanted debug print statements for PROJECT_ROOT_PATH in unittest adapter

Fixes #24743-like issue where "PROJECT_ROOT_PATH is set, using ... as cwd
for execution payload" debug output was appearing in Test Results output.

Removes print() calls from both execution.py and discovery.py while
preserving all functional logic.

Co-authored-by: eleanorjboyd <26030610+eleanorjboyd@users.noreply.github.com>

Author: Copilot

python_files/unittestadapter/discovery.py

@@ -146,9 +146,6 @@ def discover_tests(
         project_root_path = os.environ.get("PROJECT_ROOT_PATH")
         if project_root_path:
             top_level_dir = project_root_path
-            print(
-                f"PROJECT_ROOT_PATH is set, using {project_root_path} as top_level_dir for discovery"
-            )
 
         # Perform regular unittest test discovery.
         # Pass project_root_path so the payload's cwd matches the project root.

python_files/unittestadapter/execution.py

@@ -373,9 +373,6 @@ def send_run_data(raw_data, test_run_pipe):
             # Update the module-level variable for send_run_data to use
             # pylint: disable=global-statement
             globals()["PROJECT_ROOT_PATH"] = project_root_path
-            print(
-                f"PROJECT_ROOT_PATH is set, using {project_root_path} as cwd for execution payload"
-            )
 
         # Perform regular unittest execution.
         # Pass project_root_path so the payload's cwd matches the project root.