When coding a Gutenberg block plugin for WordPress and you want to remove some of the <RichText> toolbar options on that block. You can set “withoutInteractiveFormatting” and then list the allowedFormats.

<RichText
withoutInteractiveFormatting
allowedFormats={ [ 'core/bold', 'core/italic', 'core/textColor','core/strikethrough' ] }
value={ html }
/>

All Allowed Formats

• core/bold (Bold Text)
• core/code (Code Formating)
• core/image (Inline Image)
• core/italic (Italic Text)
• core/link (Link Option)
• core/strikethrough (Strikethrough Text)
• core/underline (Underline Text)
• core/textColor (Highlight)
• core/subscript (sub characters e.g. ₂)
• core/superscript, (super characters e.g. 2^nd)
• core/keyboard, (keyboard)
• core/unknown, (Clear Unknown Formating)
• core/language, (Language Options)