[Term Entry] Java ArrayList .removeIf()

[Codecademy-docs]

Reason/inspiration (optional)

Please add the .removeIf()method as a new term entry for [ArrayList](https://www.codecademy.com/resources/docs/java/array-list)�. Provide the entry in a markdown file and place under the file pathcontent/java/concepts/array-list/terms/removeIf/removeIf.md `

The entry should have the following:
� An introductory paragraph about what the method is and does.
� A syntax section with a pseudo code block with an explanation of it.
� An example showing the method in use.

Please refer to the term entry templates, content standards, and markdown style guide when working on the PR for this issue.

Entry Type (select all that apply)

New Term for Existing Concept Entry

Code of Conduct

• By submitting this issue, I agree to follow Codecademy Doc's Code of Conduct.

For Maintainers

• Labels added
• Issue is assigned

[hakdo99]

@codecademy-docs Hi! I'd like to work on this issue. Can you please assign it to me? Thanks!

[Kyra Thompson]

@hakdo99 You're assigned!