8199050: reenable concurrent execution of compiler tests

Reviewed-by: kvn
diff --git a/test/hotspot/jtreg/compiler/aot/TEST.properties b/test/hotspot/jtreg/compiler/aot/TEST.properties
deleted file mode 100644
index a88a900..0000000
--- a/test/hotspot/jtreg/compiler/aot/TEST.properties
+++ /dev/null
@@ -1,3 +0,0 @@
-# TODO: remove as soon as JIB supports concurrent installations
-exclusiveAccess.dirs=.
-