Remove explicit lake dependency.

lake-manifest.json

@@ -17,14 +17,6 @@
     "name": "proofwidgets",
     "inputRev?": "v0.0.13",
     "inherited": true}},
-  {"git":
-   {"url": "https://github.com/leanprover/lake",
-    "subDir?": null,
-    "rev": "a2ced44b7e5e30c2a6b84b420e1bbdd8d6d8e079",
-    "opts": {},
-    "name": "lake",
-    "inputRev?": "master",
-    "inherited": false}},
   {"git":
    {"url": "https://github.com/fgdorais/lean4-unicode-basic",
     "subDir?": null,
@@ -44,7 +36,7 @@
   {"git":
    {"url": "https://github.com/leanprover-community/mathlib4.git",
     "subDir?": null,
-    "rev": "d04897a61efc29f2393f448154f212472c91b47d",
+    "rev": "43718b8bde561e133edfd4ab8b5def9fb438c18d",
     "opts": {},
     "name": "mathlib",
     "inputRev?": "master",
@@ -76,7 +68,7 @@
   {"git":
    {"url": "https://github.com/leanprover/std4.git",
     "subDir?": null,
-    "rev": "14e723aabf3165e2590572bb8fd7bd3243f25542",
+    "rev": "28459f72f3190b0f540b49ab769745819eeb1c5e",
     "opts": {},
     "name": "std",
     "inputRev?": "main",

lakefile.lean

@@ -17,9 +17,6 @@ require CMark from git
 require «lean4-unicode-basic» from git
   "https://github.com/fgdorais/lean4-unicode-basic" @
     "main"
-require lake from git
-  "https://github.com/leanprover/lake" @
-    "master"
 require leanInk from git
   "https://github.com/hargonix/LeanInk" @
     "doc-gen"