Remove faiss patch (#1668)

Since this has been merged facebookresearch/faiss#4731, we no longer need the patch introduced in #1654

Authors:
  - Anupam (https://github.com/aamijar)
  - Corey J. Nolet (https://github.com/cjnolet)

Approvers:
  - Corey J. Nolet (https://github.com/cjnolet)

URL: #1668

Author: aamijar

cpp/cmake/patches/faiss-1.13-cuvs-26.02.diff

@@ -1,19 +1,14 @@
 {
   "packages" : {
     "faiss" : {
-      "version": "1.13.0",
+      "version": "1.13.x",
       "git_url": "https://github.com/facebookresearch/faiss.git",
-      "git_tag": "v1.13.0",
+      "git_tag": "main",
       "patches" : [
         {
           "file" : "${current_json_dir}/faiss-1.13-cuvs-25.12.diff",
           "issue" : "Multiple fixes for cuVS and RMM compatibility",
           "fixed_in" : ""
-        },
-        {
-          "file" : "${current_json_dir}/faiss-1.13-cuvs-26.02.diff",
-          "issue" : "Multiple fixes for RAFT compatibility",
-          "fixed_in" : ""
         }
       ]
     }