prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  Reminder: remove dead module mods
  As discussed in #3083, the `mods.py` module should be removed **after the 4.0 release**.
  
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `yt/mods.py`
  Content:
  ```
  1 #
  2 # ALL IMPORTS GO HERE
  3 #
  4 
  5 import os
  6 
  7 import numpy as np
  8 
  9 # This next item will handle most of the actual startup procedures, but it will
  10 # also attempt to parse the command line and set up the global state of various
  11 # operations.  The variable unparsed_args is not used internally but is
  12 # provided as a convenience for users who wish to parse arguments in scripts.
  13 # https://mail.python.org/archives/list/yt-dev@python.org/thread/L6AQPJ3OIMJC5SNKVM7CJG32YVQZRJWA/
  14 import yt.startup_tasks as __startup_tasks
  15 from yt import *
  16 from yt.config import ytcfg, ytcfg_defaults
  17 from yt.utilities.logger import _level
  18 
  19 unparsed_args = __startup_tasks.unparsed_args
  20 
  21 
  22 if _level >= int(ytcfg_defaults["yt"]["log_level"]):
  23     # This won't get displayed.
  24     mylog.debug("Turning off NumPy error reporting")
  25     np.seterr(all="ignore")
  26 
  27 # We load plugins.  Keep in mind, this can be fairly dangerous -
  28 # the primary purpose is to allow people to have a set of functions
  29 # that get used every time that they don't have to *define* every time.
  30 # This way, other command-line tools can be used very simply.
  31 # Unfortunately, for now, I think the easiest and simplest way of doing
  32 # this is also the most dangerous way.
  33 if ytcfg.get("yt", "load_field_plugins"):
  34     enable_plugins()
  35
  ```
  --- END FILES ---
  
  Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.
  
  Here is an example:
  
  ```diff
  diff --git a/examples/server_async.py b/examples/server_async.py
  --- a/examples/server_async.py
  +++ b/examples/server_async.py
  @@ -313,4 +313,4 @@
   
   
   if __name__ == "__main__":
  -    asyncio.run(run_async_server("."), debug=True)
  +    asyncio.run(run_async_server(), debug=True)
  diff --git a/examples/server_sync.py b/examples/server_sync.py
  --- a/examples/server_sync.py
  +++ b/examples/server_sync.py
  @@ -313,5 +313,5 @@
   
   
   if __name__ == "__main__":
  -    server = run_sync_server(".")
  +    server = run_sync_server()
       server.shutdown()
  
  ```
  
golden_diff: diff --git a/yt/mods.py b/yt/mods.py
  --- a/yt/mods.py
  +++ b/yt/mods.py
  @@ -13,9 +13,14 @@
   # https://mail.python.org/archives/list/yt-dev@python.org/thread/L6AQPJ3OIMJC5SNKVM7CJG32YVQZRJWA/
   import yt.startup_tasks as __startup_tasks
   from yt import *
  +from yt._maintenance.deprecation import issue_deprecation_warning
   from yt.config import ytcfg, ytcfg_defaults
   from yt.utilities.logger import _level
   
  +issue_deprecation_warning(
  +    "The yt.mods module is deprecated.", since="4.1.0", removal="4.2.0"
  +)
  +
   unparsed_args = __startup_tasks.unparsed_args
  
verification_info: {"golden_diff": "diff --git a/yt/mods.py b/yt/mods.py\n--- a/yt/mods.py\n+++ b/yt/mods.py\n@@ -13,9 +13,14 @@\n # https://mail.python.org/archives/list/yt-dev@python.org/thread/L6AQPJ3OIMJC5SNKVM7CJG32YVQZRJWA/\n import yt.startup_tasks as __startup_tasks\n from yt import *\n+from yt._maintenance.deprecation import issue_deprecation_warning\n from yt.config import ytcfg, ytcfg_defaults\n from yt.utilities.logger import _level\n \n+issue_deprecation_warning(\n+    \"The yt.mods module is deprecated.\", since=\"4.1.0\", removal=\"4.2.0\"\n+)\n+\n unparsed_args = __startup_tasks.unparsed_args\n", "issue": "Reminder: remove dead module mods\nAs discussed in #3083, the `mods.py` module should be removed **after the 4.0 release**.\r\n\n", "before_files": [{"content": "#\n# ALL IMPORTS GO HERE\n#\n\nimport os\n\nimport numpy as np\n\n# This next item will handle most of the actual startup procedures, but it will\n# also attempt to parse the command line and set up the global state of various\n# operations.  The variable unparsed_args is not used internally but is\n# provided as a convenience for users who wish to parse arguments in scripts.\n# https://mail.python.org/archives/list/yt-dev@python.org/thread/L6AQPJ3OIMJC5SNKVM7CJG32YVQZRJWA/\nimport yt.startup_tasks as __startup_tasks\nfrom yt import *\nfrom yt.config import ytcfg, ytcfg_defaults\nfrom yt.utilities.logger import _level\n\nunparsed_args = __startup_tasks.unparsed_args\n\n\nif _level >= int(ytcfg_defaults[\"yt\"][\"log_level\"]):\n    # This won't get displayed.\n    mylog.debug(\"Turning off NumPy error reporting\")\n    np.seterr(all=\"ignore\")\n\n# We load plugins.  Keep in mind, this can be fairly dangerous -\n# the primary purpose is to allow people to have a set of functions\n# that get used every time that they don't have to *define* every time.\n# This way, other command-line tools can be used very simply.\n# Unfortunately, for now, I think the easiest and simplest way of doing\n# this is also the most dangerous way.\nif ytcfg.get(\"yt\", \"load_field_plugins\"):\n    enable_plugins()\n", "path": "yt/mods.py"}], "after_files": [{"content": "#\n# ALL IMPORTS GO HERE\n#\n\nimport os\n\nimport numpy as np\n\n# This next item will handle most of the actual startup procedures, but it will\n# also attempt to parse the command line and set up the global state of various\n# operations.  The variable unparsed_args is not used internally but is\n# provided as a convenience for users who wish to parse arguments in scripts.\n# https://mail.python.org/archives/list/yt-dev@python.org/thread/L6AQPJ3OIMJC5SNKVM7CJG32YVQZRJWA/\nimport yt.startup_tasks as __startup_tasks\nfrom yt import *\nfrom yt._maintenance.deprecation import issue_deprecation_warning\nfrom yt.config import ytcfg, ytcfg_defaults\nfrom yt.utilities.logger import _level\n\nissue_deprecation_warning(\n    \"The yt.mods module is deprecated.\", since=\"4.1.0\", removal=\"4.2.0\"\n)\n\nunparsed_args = __startup_tasks.unparsed_args\n\n\nif _level >= int(ytcfg_defaults[\"yt\"][\"log_level\"]):\n    # This won't get displayed.\n    mylog.debug(\"Turning off NumPy error reporting\")\n    np.seterr(all=\"ignore\")\n\n# We load plugins.  Keep in mind, this can be fairly dangerous -\n# the primary purpose is to allow people to have a set of functions\n# that get used every time that they don't have to *define* every time.\n# This way, other command-line tools can be used very simply.\n# Unfortunately, for now, I think the easiest and simplest way of doing\n# this is also the most dangerous way.\nif ytcfg.get(\"yt\", \"load_field_plugins\"):\n    enable_plugins()\n", "path": "yt/mods.py"}]}