LOS ANGELES — Britney Spears’ court-appointed attorney on Tuesday filed documents to resign from her conservatorship, the latest of several such moves that have come in the fallout from the pop singer’s comments in court decrying the legal arrangement that controls her money and affairs. Samuel Ingham III filed documents in Los Angeles Superior Court requesting that the court appoint Spears a new attorney, and saying his resignation would take effect as soon as that happened. During her June 23 speech in court, in which she condemned the conservatorship and asked Judge Brenda Penny to end it, Spears was critical of Ingham, and said she wished the court would allow her to hire a lawyer of her choice. Last week, Bessemer Trust, the estate-management company that Spears had requested replace her father as conservator of her finances, filed its own documents withdrawing from the case. The filing said that circumstances …