Mark tool_id required in is_missing_shed_tool method

lib/galaxy/tool_util/toolbox/base.py

@@ -761,11 +761,8 @@ def get_tool(self, tool_id, tool_version=None, get_all_versions=False, exact=Fal
     def has_tool(self, tool_id: str, tool_version: Optional[str] = None, exact: bool = False):
         return self.get_tool(tool_id, tool_version=tool_version, exact=exact) is not None
 
-    def is_missing_shed_tool(self, tool_id: Optional[str]) -> bool:
+    def is_missing_shed_tool(self, tool_id: str) -> bool:
         """Confirm that the tool ID does reference a shed tool and is not installed."""
-        if tool_id is None:
-            # This is not a tool ID.
-            return False
         if "repos" not in tool_id:
             # This is not a shed tool.
             return False