Drop support for python 3.9, switch min version to 3.10

.python-version

@@ -1 +1 @@
-3.9.18
+3.10.20

pyproject.toml

@@ -18,11 +18,10 @@ dependencies = [
   "uuid-utils>=0.11.0",
 ]
 
-requires-python = ">= 3.9"
+requires-python = ">= 3.10"
 classifiers = [
   "Typing :: Typed",
   "Intended Audience :: Developers",
-  "Programming Language :: Python :: 3.9",
   "Programming Language :: Python :: 3.10",
   "Programming Language :: Python :: 3.11",
   "Programming Language :: Python :: 3.12",

scripts/test

@@ -56,7 +56,7 @@ export DEFER_PYDANTIC_BUILD=false
 
 # Note that we need to specify the patch version here so that uv
 # won't use unstable (alpha, beta, rc) releases for the tests
-PY_VERSION_MIN=">=3.9.0"
+PY_VERSION_MIN=">=3.10.0"
 PY_VERSION_MAX=">=3.14.0"
 
 function run_tests() {

src/runloop_api_client/_utils/_utils.py

@@ -344,26 +344,6 @@ def maybe_coerce_boolean(val: str | None) -> bool | None:
     return coerce_boolean(val)
 
 
-def removeprefix(string: str, prefix: str) -> str:
-    """Remove a prefix from a string.
-
-    Backport of `str.removeprefix` for Python < 3.9
-    """
-    if string.startswith(prefix):
-        return string[len(prefix) :]
-    return string
-
-
-def removesuffix(string: str, suffix: str) -> str:
-    """Remove a suffix from a string.
-
-    Backport of `str.removesuffix` for Python < 3.9
-    """
-    if string.endswith(suffix):
-        return string[: -len(suffix)]
-    return string
-
-
 def file_from_path(path: str) -> FileTypes:
     contents = Path(path).read_bytes()
     file_name = os.path.basename(path)