Revert "Allow mypy to use incremental runs"

This reverts commit b3673c3.

Author: twoertwein

scripts/test/run.py

@@ -6,7 +6,7 @@
 
 
 def mypy_src():
-    cmd = ["mypy", "pandas-stubs", "tests"]
+    cmd = ["mypy", "pandas-stubs", "tests", "--no-incremental"]
     subprocess.run(cmd, check=True)