Fixed the error where 'PoisonTextBox.ContextMenuStrip' attribute cannot be used properly

[Hgnim]

I used machine translation, which may make the article look strange. Please forgive me

When I use this attribute and start debugging, an error will be reported in this attributeSystem.StackOverflowException:"Exception_WasThrown"

I can use the functionality of this property normally after override it on my project

I checked the source code and found that there was a line of code that would cause the program to loop, so I removed it

[github-actions]

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