Potential fix for code scanning alert no. 821: Unused local variable

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>
Signed-off-by: Mariana <47233618+mgrafu@users.noreply.github.com>

Author: mgrafu

nemo_text_processing/text_normalization/hi/taggers/date.py

@@ -73,7 +73,6 @@ def __init__(self, cardinal: GraphFst):
 
         delete_dash = pynutil.delete("-")
         delete_slash = pynutil.delete("/")
-        delete_comma = pynutil.delete(",")
 
         days_graph = pynutil.insert("day: \"") + days + pynutil.insert("\"") + insert_space