Revert "pack-objects: add trace2 regions"

This reverts commit d9bbeed.

Author: jeffhostetler

builtin/pack-objects.c

@@ -33,7 +33,6 @@
 #include "object-store.h"
 #include "dir.h"
 #include "midx.h"
-#include "trace2.h"
 
 #define IN_PACK(obj) oe_in_pack(&to_pack, obj)
 #define SIZE(obj) oe_size(&to_pack, obj)
@@ -3479,7 +3478,6 @@ int cmd_pack_objects(int argc, const char **argv, const char *prefix)
 		}
 	}
 
-	trace2_region_enter("pack-objects", "enumerate-objects", the_repository);
 	prepare_packing_data(&to_pack);
 
 	if (progress)
@@ -3494,20 +3492,12 @@ int cmd_pack_objects(int argc, const char **argv, const char *prefix)
 	if (include_tag && nr_result)
 		for_each_ref(add_ref_tag, NULL);
 	stop_progress(&progress_state);
-	trace2_region_leave("pack-objects", "enumerate-objects", the_repository);
 
 	if (non_empty && !nr_result)
 		return 0;
-	if (nr_result) {
-		trace2_region_enter("pack-objects", "prepare-pack", the_repository);
+	if (nr_result)
 		prepare_pack(window, depth);
-		trace2_region_leave("pack-objects", "prepare-pack", the_repository);
-	}
-
-	trace2_region_enter("pack-objects", "write-pack-file", the_repository);
 	write_pack_file();
-	trace2_region_leave("pack-objects", "write-pack-file", the_repository);
-
 	if (progress)
 		fprintf_ln(stderr,
 			   _("Total %"PRIu32" (delta %"PRIu32"),"