Fix warning in FeatureView.from_proto

[tsotnet]

Signed-off-by: Tsotne Tabidze tsotne@tecton.ai

What this PR does / why we need it: Fixes a warning printed during feast materialize-incremental

Which issue(s) this PR fixes:

Fixes #

Does this PR introduce a user-facing change?:

NONE

[achals]

/lgtm

[feast-ci-bot]

[APPROVALNOTIFIER] This PR is APPROVED

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[codecov-commenter]

Codecov Report

Merging #1751 (cf9b470) into master (1841bb3) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1751      +/-   ##
==========================================
- Coverage   83.95%   83.94%   -0.02%     
==========================================
  Files          73       73              
  Lines        6003     6003              
==========================================
- Hits         5040     5039       -1     
- Misses        963      964       +1     

Flag	Coverage Δ
integrationtests	83.85% <ø> (-0.02%)	⬇️
unittests	64.14% <ø> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
sdk/python/feast/feature_view.py	86.33% <ø> (-0.72%)	⬇️

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