BUG: Deprecation Warning 'series.append' use pandas.concat instead

[benaurelschill]

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Reproducible Example

import modin.pandas as pd
data = {'id': ["ajajajajajjajajajajajaja", "jajjajajajajajajajajja"]}
df = pd.DataFrame(data)
df['ID_short'] = df['id'].str.slice(0, 3)

Issue Description

The append method is depreciated since pandas 1.4.0 and should not be used anymore. Use pandas.concat instead.
(https://pandas.pydata.org/docs/reference/api/pandas.DataFrame.append.html)
With pandas this warning doesn't occur.

Expected Behavior

No warnings should appear.

Error Logs

FutureWarning: The series.append method is deprecated and will be removed from pandas in a future version. Use pandas.concat instead.

Installed Versions

INSTALLED VERSIONS

commit : 621bc10
python : 3.9.10.final.0
python-bits : 64
OS : Linux
OS-release : 5.14.0-70.26.1.el9_0.x86_64
Version : #1 SMP PREEMPT Fri Sep 2 16:07:40 EDT 2022
machine : x86_64
processor : x86_64
byteorder : little
LC_ALL : None
LANG : en_US.UTF-8
LOCALE : en_US.UTF-8

Modin dependencies

modin : 0.16.0
ray : 2.0.0
dask : 2022.01.1
distributed : 2022.01.1
hdk : None

pandas dependencies

pandas : 1.5.0
numpy : 1.23.2
pytz : 2022.2.1
dateutil : 2.8.2
setuptools : 53.0.0
pip : 21.2.3
Cython : 0.29.32
pytest : None
hypothesis : None
sphinx : None
blosc : None
feather : None
xlsxwriter : None
lxml.etree : 4.6.5
html5lib : None
pymysql : 1.0.2
psycopg2 : 2.9.3
jinja2 : 3.1.2
IPython : 8.4.0
pandas_datareader: None
bs4 : 4.11.1
bottleneck : None
brotli : None
fastparquet : None
fsspec : 2022.7.1
gcsfs : None
matplotlib : 3.5.3
numba : None
numexpr : None
odfpy : None
openpyxl : None
pandas_gbq : None
pyarrow : 6.0.1
pyreadstat : None
pyxlsb : None
s3fs : None
scipy : 1.9.0
snappy : None
sqlalchemy : 1.4.40
tables : None
tabulate : 0.8.10
xarray : None
xlrd : None
xlwt : None
zstandard : None
tzdata : None

[mvashishtha]

@benaurelschill thank you for reporting this bug. I can reproduce it with your script at Modin version 621bc10. I'm working on a small fix.