[gh_cli] Do not remove Windows (#8216)

[skip build] because we can't build it [skip ci]

G/gh_cli/build_tarballs.jl

@@ -14,16 +14,12 @@ sources = [
 script = raw"""
 cd $WORKSPACE/srcdir/cli
 go build -v ./cmd/gh
-mkdir ${bindir}
-mv gh${exeext} ${bindir}/gh${exeext}
+install -Dvm 755 gh${exeext} ${bindir}/gh${exeext}
 """
 
 # These are the platforms we will build for by default, unless further
 # platforms are passed in on the command line
 platforms = supported_platforms()
-# We disable Windows because the Go compiler reports an internal error there:
-#     `<unknown line number>: internal compiler error: assertion failed`
-filter!(!Sys.iswindows, platforms)
 
 # The products that we will ensure are always built
 products = [