Please help us help you and fill where relevant:
Your LimeSurvey version: 6.10
Own server or LimeSurvey hosting: community on premise
Survey theme/template: custom survey template
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I remember, in the past, there was a way to disable questions types A B C D ! 1 2 3 by providing an array customization of blacklisted question types to config.php.
Maybe it was version 4.x or maybe was 5.x branch. I can't remember. In previous version 3.x I used to patch directly LS_application.php file.

Now, in 6.x version, I found a class LoadQuestionTypes but I can't understand how can be used.
Considering I don't want upload, gender, yes-no questions to be used, can you tell how to alter config.php?
Thank you in advance