dev-python/cython: drop unused patch

Signed-off-by: Sam James <sam@gentoo.org>

dev-python/cython/files/cython-3.1.0_rc1-rdma-core-hang.patch

@@ -1,54 +0,0 @@
-From a0794ffb47c9f44be94b3cd8fe6c639766cbda26 Mon Sep 17 00:00:00 2001
-From: Stefan Behnel <stefan_ml@behnel.de>
-Date: Sun, 4 May 2025 21:48:27 +0200
-Subject: [PATCH] Prevent infinite loop in type inference when a variable is
- named like the type of its value (e.g. list += []).
-
-Closes https://github.com/cython/cython/issues/6835
----
- Cython/Compiler/ExprNodes.py |  2 +-
- tests/run/type_inference.pyx | 24 ++++++++++++++++++++++++
- 2 files changed, 25 insertions(+), 1 deletion(-)
-
-diff --git a/Cython/Compiler/ExprNodes.py b/Cython/Compiler/ExprNodes.py
-index a0413ab8d62..b02154a0b30 100644
---- a/Cython/Compiler/ExprNodes.py
-+++ b/Cython/Compiler/ExprNodes.py
-@@ -2042,7 +2042,7 @@ def infer_type(self, env):
-                 return self.inferred_type
-             return py_object_type
-         elif (self.entry.type.is_extension_type or self.entry.type.is_builtin_type) and \
--                self.name == self.entry.type.name:
-+                not self.is_target and self.name == self.entry.type.name:
-             # Unfortunately the type attribute of type objects
-             # is used for the pointer to the type they represent.
-             return type_type
-diff --git a/tests/run/type_inference.pyx b/tests/run/type_inference.pyx
-index b746d05d9f3..226455dae0d 100644
---- a/tests/run/type_inference.pyx
-+++ b/tests/run/type_inference.pyx
-@@ -883,3 +886,24 @@ def test_builtin_max():
-             a = max(self.a, self.a)
-             assert typeof(a) == "Python object", typeof(a)
-     C().get_max()
-+
-+
-+def variable_with_name_of_type():
-+    """
-+    >>> variable_with_name_of_type()
-+    ([], 'abc')
-+    """
-+    # Names like 'list.append' refer to the type and must be inferred as such,
-+    # but a simple variable called 'list' is not the same and used to break type inference.
-+    # See https://github.com/cython/cython/issues/6835
-+    rest_list = []
-+    list = []  # note: same name as type of value
-+    list += rest_list
-+    assert typeof(list) == 'list object', typeof(list)
-+
-+    rest_str = "abc"
-+    str = ""
-+    str += rest_str
-+    assert typeof(str) == 'str object', typeof(str)
-+
-+    return list, str