Replace the unavailable linked test-case for issue 1655 with a reduced test-case

Re: issue 1655 and PR 1978.

test/pdfs/.gitignore

@@ -36,6 +36,7 @@
 !issue6019.pdf
 !issue6621.pdf
 !issue1293r.pdf
+!issue1655r.pdf
 !issue6541.pdf
 !issue2948.pdf
 !issue6231_1.pdf

test/pdfs/issue1655.pdf.link

@@ -1 +0,0 @@
-http://bblum.net/thesis-draft.pdf

test/test_manifest.json

@@ -1480,13 +1480,11 @@
        "about": "Inline JPEG images."
     },
     {  "id": "issue1655",
-      "file": "pdfs/issue1655.pdf",
+       "file": "pdfs/issue1655r.pdf",
-      "md5": "696ef6de6f4f71643771419ef04fc968",
+       "md5": "569f48449ba57c15c4f9ade151a651c5",
-      "rounds": 1,
+       "rounds": 1,
-      "skipPages": [1, 2, 3, 4, 5, 6, 7, 8],
+       "link": false,
-      "lastPage": 9,
+       "type": "eq"
-      "link": true,
-      "type": "eq"
     },
     {  "id": "issue1687",
       "file": "pdfs/issue1687.pdf",