Fix test and linter issues

Author: sommerlukas

dpctl/_backend.pxd

@@ -574,11 +574,12 @@ cdef extern from "syclinterface/dpctl_sycl_extension_interface.h":
     cdef bint DPCTLWorkGroupMemory_Available()
 
     cdef struct DPCTLOpaqueRawKernelArg
-    ctypedef DPCTLOpaqueRawKernelArg *DPCTLSyclRawKernelArgRef;
+    ctypedef DPCTLOpaqueRawKernelArg *DPCTLSyclRawKernelArgRef
 
-    cdef DPCTLSyclRawKernelArgRef DPCTLRawKernelArg_Create(void* bytes, size_t count);
+    cdef DPCTLSyclRawKernelArgRef DPCTLRawKernelArg_Create(void* bytes,
+                                                           size_t count)
 
     cdef void DPCTLRawKernelArg_Delete(
-        DPCTLSyclRawKernelArgRef Ref);
+        DPCTLSyclRawKernelArgRef Ref)
 
-    cdef bint DPCTLRawKernelArg_Available();
+    cdef bint DPCTLRawKernelArg_Available()

dpctl/_sycl_queue.pyx

@@ -1814,8 +1814,9 @@ cdef class RawKernelArg:
                                 "expects argument to be buffer",
                                 f"but got {type(args[0])}")
 
-            ret_code = PyObject_GetBuffer(args[0], &(_buffer), PyBUF_SIMPLE | PyBUF_ANY_CONTIGUOUS)
-            if ret_code != 0: # pragma: no cover
+            ret_code = PyObject_GetBuffer(args[0], &(_buffer),
+                                          PyBUF_SIMPLE | PyBUF_ANY_CONTIGUOUS)
+            if ret_code != 0:  # pragma: no cover
                 raise RuntimeError("Could not access buffer")
 
             ptr = _buffer.buf
@@ -1837,11 +1838,9 @@ cdef class RawKernelArg:
         if(_is_buf):
             PyBuffer_Release(&(_buffer))
 
-
-    """Check whether the raw_kernel_arg extension is available"""
     @staticmethod
     def is_available():
-        return DPCTLRawKernelArg_Available();
+        return DPCTLRawKernelArg_Available()
 
     property _ref:
         """Returns the address of the C API ``DPCTLRawKernelArgRef`` pointer

dpctl/sycl.pxd

@@ -85,12 +85,3 @@ cdef extern from "syclinterface/dpctl_sycl_type_casters.hpp" \
         "dpctl::syclinterface::unwrap<RawWorkGroupMemory>" (
             dpctl_backend.DPCTLSyclWorkGroupMemoryRef
         )
-
-    # raw kernel arg extension
-    cdef dpctl_backend.DPCTLSyclRawKernelArgRef wrap_raw_kernel_arg \
-            "dpctl::syclinterface::wrap<std::vector<unsigned char>>" \
-            (const std::vector<unsigned char> *)
-
-    cdef std::vector<unsigned char> * unwrap_raw_kernel_arg \
-            "dpctl::syclinterface::unwrap<std::vector<unsigned char>>" (
-            dpctl_backend.DPCTLSyclRawKernelArgRef)