ci(build_depends.repos): remove grid_map (autowarefoundation#2429)

* ci: remove Galactic CI workflows

Signed-off-by: Kenji Miyake <kenji.miyake@tier4.jp>

* ci(build_depends.repos): remove grid_map

Signed-off-by: Kenji Miyake <kenji.miyake@tier4.jp>

Signed-off-by: Kenji Miyake <kenji.miyake@tier4.jp>

Author: kenji-miyake

build_depends.repos

@@ -25,10 +25,6 @@ repositories:
     type: git
     url: https://github.com/tier4/tier4_autoware_msgs.git
     version: tier4/universe
-  universe/external/grid_map:
-    type: git
-    url: https://github.com/ANYbotics/grid_map.git
-    version: 74333f037cfce321248dfa7b954a815d4f67d79d
   universe/external/mussp:
     type: git
     url: https://github.com/tier4/muSSP.git