remove usage of arrow in IN.py (#7277)

Co-authored-by: Viktor Andersson <30777521+VIKTORVAV99@users.noreply.github.com>

parsers/IN.py

@@ -7,7 +7,6 @@
 from typing import Any
 from zoneinfo import ZoneInfo
 
-import arrow
 import numpy as np
 import pandas as pd
 from bs4 import BeautifulSoup
@@ -22,7 +21,7 @@
 from parsers.lib.exceptions import ParserException
 
 IN_TZ = ZoneInfo("Asia/Kolkata")
-START_DATE_RENEWABLE_DATA = arrow.get("2020-12-17", tzinfo=IN_TZ).datetime
+START_DATE_RENEWABLE_DATA = datetime(2020, 12, 17, tzinfo=IN_TZ)
 CONVERSION_GWH_MW = 0.024
 GENERATION_MAPPING = {
     "THERMAL GENERATION": "coal",
@@ -498,7 +497,7 @@ def daily_to_hourly_production_data(
 
 
 def get_start_of_day(dt: datetime) -> datetime:
-    dt_localised = arrow.get(dt).to(IN_TZ).datetime
+    dt_localised = dt.astimezone(IN_TZ)
     dt_start = dt_localised.replace(hour=0, minute=0, second=0, microsecond=0)
     return dt_start