Remove URL field for patches in conandata.yml

This follows the documented practices for Conan Center.
URL was removed in favor of the patch_source field.

recipes/boost/all/conandata.yml

@@ -246,7 +246,6 @@ patches:
     - patch_file: "patches/1.79.0-geometry_no_rtti.patch"
       base_path: "source_subfolder"
       patch_type: "portability"
-      url: "https://github.com/boostorg/geometry/commit/b354162798749b3aaa539755e7b9be49d2b9a9c4.patch"
       patch_source: "https://github.com/boostorg/geometry/discussions/1041"
   1.80.0:
     - patch_file: "patches/1.80.0-locale-fail-on-missing-backend.patch"
@@ -262,22 +261,18 @@ patches:
       patch_type: "official"
       patch_source: "https://github.com/boostorg/filesystem/issues/245"
       base_path: "source_subfolder"
-      url: "https://www.boost.org/patches/1_80_0/0001-filesystem-win-fix-dir-it-net-share.patch"
     - patch_file: "patches/1.80.0-0002-filesystem-fix-weakly-canonical-long-path.patch"
       patch_description: 'On Windows, weakly_canonical fails to process paths that start with the "\\?\" prefix'
       patch_type: "official"
       patch_source: "https://github.com/boostorg/filesystem/issues/247"
       base_path: "source_subfolder"
-      url: "https://www.boost.org/patches/1_80_0/0002-filesystem-fix-weakly-canonical-long-paths.patch"
     - patch_file: "patches/1.80.0-0003-unordered-valid-after-move.patch"
       patch_description: "Containers are not in a valid state after moving"
       patch_type: "official"
       patch_source: "https://github.com/boostorg/unordered/issues/139"
       base_path: "source_subfolder"
-      url: "https://www.boost.org/patches/1_80_0/0003-unordered-valid-after-move.patch"
     - patch_file: "patches/1.80.0-0004-filesystem-posix-fix-no-at-apis-missing-include.patch"
       patch_description: "On POSIX systems that don't support *at APIs, compilation fails due to a missing include"
       patch_type: "official"
       patch_source: "https://github.com/boostorg/filesystem/issues/250"
       base_path: "source_subfolder"
-      url: "https://www.boost.org/patches/1_80_0/0004-filesystem-posix-fix-no-at-apis-missing-include.patch"