Would remove 2 entries (68.4K) under _build

  -----------------------------------------------------------------------
      SIZE  LAST BUILD    BUILD FOLDER
  -----------------------------------------------------------------------
    146.5K  3 days ago    _build
     68.4K  3 days ago    └── removed (2 of 3 entries)
  -----------------------------------------------------------------------

  -----------------------------------------------------------------------
      SIZE  LAST BUILD    BY TOOLCHAIN VARIANT
  -----------------------------------------------------------------------
    146.5K  3 days ago    └── -✓- gcc15
     68.4K  3 days ago            ├── ✓✓✓ dbg/x86_64/cxx2c
     78.1K  3 days ago            └── --- rel/x86_64/cxx2c
  -----------------------------------------------------------------------

  -----------------------------------------------------------------------
      SIZE  REMOVED       BY SCONSCRIPT
  -----------------------------------------------------------------------
     19.5K     ✔✔✔        ├── lib
     19.5K     ✓✓✓        │   └── gcc15
     19.5K      ✓         │       └── dbg/x86_64/cxx2c
      127K     -✓-        └── test
      127K     -✓-            └── gcc15
     48.8K      ✓                 ├── dbg/x86_64/cxx2c
     78.1K                        └── rel/x86_64/cxx2c
  -----------------------------------------------------------------------

Would remove 2 entries freeing up 68.4K of disk space.
dry run (-n); nothing removed

Verify the removal with the same selection by adding --list-builds:

cuppa -D --dbg --toolchains=gcc15 --list-builds
