Update requirements-tests.txt

Author: YuriiMotov

requirements-tests.txt

@@ -2,15 +2,11 @@
 -r requirements-docs-tests.txt
 pytest >=7.0.1,<9.0.0
 coverage[toml] >=6.2,<8.0
-# Remove when support for Python 3.8 is dropped
-mypy ==1.14.1; python_version < "3.9"
-mypy ==1.19.1; python_version >= "3.9"
+mypy ==1.19.1
 ruff ==0.14.10
 # For FastAPI tests
 fastapi >=0.103.2,<0.126.0
 httpx ==0.28.1
 dirty-equals ==0.9.0
 jinja2 ==3.1.6
-# Remove when support for Python 3.8 is dropped
-typing-extensions ==4.13.2; python_version < "3.9"
-typing-extensions ==4.15.0; python_version >= "3.9"
+typing-extensions ==4.15.0