gc doesn't work for pr-{number} channels

[LilithHafner]

Somehow I ended up with a lot of julia-pr{number} folders taking up space in my ~/.julia/juliaup folder. I'm assuming juliaup created them and failed to gc them:

x@x:~$ juliaup status
 Default  Channel  Version                              Update           
-------------------------------------------------------------------------
          1        1.11.2+0.aarch64.linux.gnu                            
          1.0      1.0.5+0.aarch64.linux.gnu                             
          1.3      1.3.1+0.aarch64.linux.gnu                             
          1.6      1.6.7+0.aarch64.linux.gnu                             
          1.9      1.9.4+0.aarch64.linux.gnu                             
          1.10     1.10.7+0.aarch64.linux.gnu                            
          1.11     1.11.2+0.aarch64.linux.gnu                            
          lts      1.10.7+0.aarch64.linux.gnu                            
          nightly  Development version 1.12.0-DEV.1717  Update available 
       *  release  1.11.2+0.aarch64.linux.gnu                            
x@x:~$ juliaup gc
x@x:~$ du -hd1 .julia/juliaup/
373M	.julia/juliaup/julia-1.6.7+0.aarch64.linux.gnu
257M	.julia/juliaup/julia-1.0.5+0.aarch64.linux.gnu
480M	.julia/juliaup/julia-1.9.4+0.aarch64.linux.gnu
446M	.julia/juliaup/julia-temp-KCfKZ7
432M	.julia/juliaup/julia-1.8.5+0.aarch64.linux.gnu
373M	.julia/juliaup/julia-1.6.0+0.aarch64.linux.gnu
229M	.julia/juliaup/julia-temp-cxrr5B
403M	.julia/juliaup/julia-1.7.3+0.aarch64.linux.gnu
1.1G	.julia/juliaup/julia-pr55599
1018M	.julia/juliaup/julia-pr55754
993M	.julia/juliaup/julia-pr55988
992M	.julia/juliaup/julia-pr55970
1.1G	.julia/juliaup/julia-pr55869
1.1G	.julia/juliaup/julia-pr55165
610M	.julia/juliaup/julia-1.10.5+0.aarch64.linux.gnu
995M	.julia/juliaup/julia-pr56113
285M	.julia/juliaup/julia-1.3.1+0.aarch64.linux.gnu
262M	.julia/juliaup/julia-temp-3JIZev
779M	.julia/juliaup/julia-temp-4icY4w
611M	.julia/juliaup/julia-1.10.7+0.aarch64.linux.gnu
1.1G	.julia/juliaup/julia-1.11.2+0.aarch64.linux.gnu
1.1G	.julia/juliaup/julia-nightly
15G	.julia/juliaup/
x@x:~$ rm -rf .julia/juliaup/julia-pr*