fix a few lints

jupyter_server/gateway/managers.py

@@ -144,7 +144,7 @@ async def shutdown_kernel(self, kernel_id, now=False, restart=False):
             The purpose of this shutdown is to restart the kernel (True)
         """
         km = self.get_kernel(kernel_id)
-        await km.shutdown_kernel(now=now, restart=restart)  # type:ignore[misc]
+        await km.shutdown_kernel(now=now, restart=restart)
         self.remove_kernel(kernel_id)
 
     async def restart_kernel(self, kernel_id, now=False, **kwargs):
@@ -156,7 +156,7 @@ async def restart_kernel(self, kernel_id, now=False, **kwargs):
             The id of the kernel to restart.
         """
         km = self.get_kernel(kernel_id)
-        await km.restart_kernel(now=now, **kwargs)  # type:ignore[misc]
+        await km.restart_kernel(now=now, **kwargs)
 
     async def interrupt_kernel(self, kernel_id, **kwargs):
         """Interrupt a kernel by its kernel uuid.
@@ -167,14 +167,14 @@ async def interrupt_kernel(self, kernel_id, **kwargs):
             The id of the kernel to interrupt.
         """
         km = self.get_kernel(kernel_id)
-        await km.interrupt_kernel()  # type:ignore[misc]
+        await km.interrupt_kernel()
 
     async def shutdown_all(self, now=False):
         """Shutdown all kernels."""
         kids = list(self._kernels)
         for kernel_id in kids:
             km = self.get_kernel(kernel_id)
-            await km.shutdown_kernel(now=now)  # type:ignore[misc]
+            await km.shutdown_kernel(now=now)
             self.remove_kernel(kernel_id)
 
     async def cull_kernels(self):

jupyter_server/services/kernels/kernelmanager.py

@@ -256,7 +256,7 @@ async def _async_start_kernel(  # type:ignore[override]
     # see https://github.com/jupyter-server/jupyter_server/issues/1165
     # this assignment is technically incorrect, but might need a change of API
     # in jupyter_client.
-    start_kernel = _async_start_kernel  # type: ignore[assignment]
+    start_kernel = _async_start_kernel
 
     async def _finish_kernel_start(self, kernel_id):
         """Handle a kernel that finishes starting."""

jupyter_server/services/sessions/sessionmanager.py

@@ -466,7 +466,7 @@ async def kernel_culled(self, kernel_id: str) -> bool:
 
     async def row_to_model(self, row, tolerate_culled=False):
         """Takes sqlite database session row and turns it into a dictionary"""
-        kernel_culled = await ensure_async(self.kernel_culled(row["kernel_id"]))
+        kernel_culled: bool = await ensure_async(self.kernel_culled(row["kernel_id"]))
         if kernel_culled:
             # The kernel was culled or died without deleting the session.
             # We can't use delete_session here because that tries to find