fix(base): remove inverted P0-bootstrap-workspace-fix.patch

The base build was failing with:

  error: multiple workspace roots found in the same workspace:
    bootstrap
    source

because P0-bootstrap-workspace-fix.patch was adding a [workspace] block
to bootstrap/Cargo.toml, while P0-workspace-add-bootstrap.patch was
adding 'bootstrap' as a member of the parent source/Cargo.toml
workspace. Cargo forbids a member from also being a workspace root.

The correct fix is P0-workspace-add-bootstrap.patch alone (which makes
bootstrap a member of the parent workspace). The P0-bootstrap-workspace-fix
patch was an inverted/historical artifact and has been removed.

This restores the build to working state for the redbear-mini target.

local/patches/base/P0-bootstrap-workspace-fix.patch

@@ -1,13 +0,0 @@
-diff --git a/bootstrap/Cargo.toml b/bootstrap/Cargo.toml
-index 82120c21..be1f8326 100644
---- a/bootstrap/Cargo.toml
-+++ b/bootstrap/Cargo.toml
-@@ -6,6 +6,8 @@ authors = ["4lDO2 <4lDO2@protonmail.com>"]
- edition = "2024"
- license = "MIT"
- 
-+[workspace]
-+
- [dependencies]
- hashbrown = { version = "0.15", default-features = false, features = [
-     "inline-more",