regression: Remove pdf option in export messages as file

[tiagoevanp]

Proposed changes (including videos or screenshots)

Issue(s)

https://rocketchat.atlassian.net/browse/CORE-1228

Steps to test or reproduce

Further comments

[dionisio-bot]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 65.60%. Comparing base (9f3c11c) to head (c1f163c).
Report is 1 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #36319      +/-   ##
===========================================
+ Coverage    65.57%   65.60%   +0.03%     
===========================================
  Files         3172     3172              
  Lines       105477   105484       +7     
  Branches     20042    20048       +6     
===========================================
+ Hits         69171    69208      +37     
+ Misses       33622    33603      -19     
+ Partials      2684     2673      -11     

Flag	Coverage Δ
e2e	58.17% <100.00%> (+0.02%)	⬆️
unit	70.73% <ø> (+0.04%)	⬆️

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[MartinSchoeler]

Could we take the opportunity to create some tests for these select variations? We could either extend the existing e2e tests or maybe create a unit test from the existing storybook