[Bug 2123863] [NEW] Remove package from 25.10

[Max Gilmour]

Public bug reported:

rustc-1.81 was used to bootstrap the subsequent Rust toolchain and is no
longer required to build any other packages:

$ checkrdepends --no-ports --include-provides --suite questing --archive-base 'http://archive.ubuntu.com/ubuntu' rustc-1.81
-- questing/universe build deps on cargo-1.81:
rustc-1.82 cargo-1.81|cargo-1.82
-- questing/universe build deps on rustc-1.81:
rustc-1.82 rustc-1.81|rustc-1.82

I have also reached out to the Kernel team and confirmed that they are
only using the Rust version in rust-defaults (rustc-1.85).

Therefore, rustc-1.81 can be removed before the 25.10 release.

** Affects: rustc-1.81 (Ubuntu)
     Importance: Undecided
         Status: New

** Affects: rustc-1.81 (Ubuntu Questing)
     Importance: Undecided
         Status: New


** Tags: questing

** Also affects: rustc-1.81 (Ubuntu Questing)
   Importance: Undecided
     Assignee: Max Gilmour (maxgmr)
       Status: New

** Changed in: rustc-1.81 (Ubuntu Questing)
     Assignee: Max Gilmour (maxgmr) => (unassigned)

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https://bugs.launchpad.net/bugs/2123863

Title:
  Remove package from 25.10

Status in rustc-1.81 package in Ubuntu:
  New
Status in rustc-1.81 source package in Questing:
  New

Bug description:
  rustc-1.81 was used to bootstrap the subsequent Rust toolchain and is
  no longer required to build any other packages:

  $ checkrdepends --no-ports --include-provides --suite questing --archive-base 'http://archive.ubuntu.com/ubuntu' rustc-1.81
  -- questing/universe build deps on cargo-1.81:
  rustc-1.82 cargo-1.81|cargo-1.82
  -- questing/universe build deps on rustc-1.81:
  rustc-1.82 rustc-1.81|rustc-1.82

  I have also reached out to the Kernel team and confirmed that they are
  only using the Rust version in rust-defaults (rustc-1.85).

  Therefore, rustc-1.81 can be removed before the 25.10 release.

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