clean: avoid quoting twice

qname is the result of quote_path_relative(), which does
quote_c_style_counted() internally. Remove the hard-coded quotes.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/builtin/clean.c b/builtin/clean.c
index c8798f5..8f602c9 100644
--- a/builtin/clean.c
+++ b/builtin/clean.c
@@ -153,7 +153,7 @@
 					printf("Removing %s\n", qname);
 				if (remove_dir_recursively(&directory,
 							   rm_flags) != 0) {
-					warning("failed to remove '%s'", qname);
+					warning("failed to remove %s", qname);
 					errors++;
 				}
 			} else if (show_only) {
@@ -173,7 +173,7 @@
 				printf("Removing %s\n", qname);
 			}
 			if (unlink(ent->name) != 0) {
-				warning("failed to remove '%s'", qname);
+				warning("failed to remove %s", qname);
 				errors++;
 			}
 		}