Fix remove_duplicates function to handle binary values

[ca20110820]

This PR addresses an issue (originally found in unit test run) where the binary values for 1 and True (0 and False) are treated equally for this function.

Changes

• Updated implementation of remove_duplicates(array) function.
• Updated the unit tests for remove_duplicates(array) function.
• Added docstring to reflect the improved behavior and provide clear examples.
• Fixed the subsequent error in test_summarize_ranges() method in the same test script (test_array.py)