test: remove stale machine-specific bootstrap-test scratch file

bootstrap-test.janet slurped a hardcoded /Users/yogthos/src/sci path (a
personal SCI clone, not vendor/sci) and had no assertions — a dev scratch
file that fails anywhere but the author's machine. SCI loading is already
covered by sci-bootstrap-test/sci-runtime-test against the vendored
submodule.

test/integration/bootstrap-test.janet

@@ -1,28 +0,0 @@
-(use ../../src/jolt/evaluator)
-(use ../../src/jolt/types)
-(use ../../src/jolt/reader)
-(use ../../src/jolt/api)
-
-(def ctx (init))
-(def source (slurp "/Users/yogthos/src/sci/src/sci/impl/macros.cljc"))
-(var s source)
-(var count 0)
-
-(while (> (length (string/trim s)) 0)
-  (def [form rest] (parse-next s))
-  (set s rest)
-  (++ count)
-  (if (not (nil? form))
-    (do
-      (printf "eval form %d..." count)
-      (flush)
-      (eval-form ctx @{} form)
-      (printf " OK\n"))))
-
-(printf "\n%d forms processed\n" count)
-(printf "ns: %s\n" (ctx-current-ns ctx))
-
-(let [ns (ctx-find-ns ctx "sci.impl.macros")]
-  (printf "sci.impl.macros bindings:\n")
-  (loop [[name v] :pairs (ns :mappings)]
-    (printf "  %s: macro=%q\n" name (v :macro))))