fix: Drop repeated stack_push mapping

Author: fei6409

lua/blame/views/window_view.lua

@@ -285,16 +285,6 @@ function WindowView:setup_keybinds(buff)
         self.config
     )
 
-    mappings.set_keymap(
-        "n",
-        "stack_push",
-        function()
-            self:blame_stack_push()
-        end,
-        { buffer = buff, nowait = true, silent = true, noremap = true },
-        self.config
-    )
-
     mappings.set_keymap(
         "n",
         "stack_pop",