remove copybara (no longer needed)

tools/copybara/config/copy.bara.sky

@@ -1,39 +0,0 @@
-sourceUrlGitea = "git@git.semicol.in:semicolin/sneak-private.git"
-
-destinationUrlGitea = "git@git.semicol.in:semicolin/sneak.git"
-destinationUrlGitHub = "git@github.com:mcmillen/sneak.git"
-
-files = ["README.md", "tools/**", "Shared/**", "SharedTests/**", "Jumpy.Shared/**"]
-
-core.workflow(
-    name = "gitea",
-    mode = "ITERATIVE",
-    origin = git.origin(
-        url = sourceUrlGitea,
-        ref = "master",
-    ),
-    destination = git.destination(
-        url = destinationUrlGitea,
-        fetch = "master",
-        push = "master",
-    ),
-    origin_files = glob(files),
-    authoring = authoring.pass_thru("Unknown Author <nobody@semicolin.games>"),
-)
-
-core.workflow(
-    name = "github",
-    mode = "ITERATIVE",
-    origin = git.origin(
-        url = sourceUrlGitea,
-        ref = "master",
-    ),
-    destination = git.destination(
-        url = destinationUrlGitHub,
-        fetch = "master",
-        push = "master",
-    ),
-    origin_files = glob(files),
-    authoring = authoring.pass_thru("Unknown Author <nobody@semicolin.games>"),
-)
-

tools/copybara/copybara.sh

@@ -1,7 +0,0 @@
-#/bin/sh
-
-SCRIPT=$(readlink -f "$0")
-SCRIPTPATH=$(dirname "$SCRIPT")
-
-java -jar ~/bin/copybara_deploy.jar migrate $SCRIPTPATH/config/copy.bara.sky gitea 
-java -jar ~/bin/copybara_deploy.jar migrate $SCRIPTPATH/config/copy.bara.sky github