diff --git a/spacy/memory.pxd b/spacy/memory.pxd
deleted file mode 100644
index dbe463c9c..000000000
--- a/spacy/memory.pxd
+++ /dev/null
@@ -1,12 +0,0 @@
-from libcpp.vector cimport vector
-from cymem.cymem cimport Pool
-
-cdef class _Pool:
-    cdef vector[void*] _addresses
-
-    cdef void* alloc(self, size_t number, size_t size) except NULL
-    cdef void* realloc(self, void* addr, size_t n) except NULL
-
-
-cdef class Address:
-    cdef size_t addr
diff --git a/spacy/memory.pyx b/spacy/memory.pyx
deleted file mode 100644
index 0a4d82f34..000000000
--- a/spacy/memory.pyx
+++ /dev/null
@@ -1,41 +0,0 @@
-from cpython.mem cimport PyMem_Malloc, PyMem_Realloc, PyMem_Free
-from libc.string cimport memset
-
-from libcpp.vector cimport vector
-
-from cymem cimport Pool
-
-
-cdef class Pool:
-    def __cinit__(self):
-        pass
-
-    def __dealloc__(self):
-        cdef void* addr
-        for addr in self._addresses:
-            PyMem_Free(<void*>addr)
-
-    cdef void* alloc(self, size_t number, size_t size) except NULL:
-        cdef void* addr = PyMem_Malloc(number * size)
-        memset(addr, 0, number * size)
-        self._addresses.push_back(addr)
-        return addr
-
-    cdef void* realloc(self, void* addr, size_t n) except NULL:
-        cdef size_t i
-        for i in range(self.size()):
-            if self._addresses[i] == addr:
-                self._addresses[i] = PyMem_Realloc(addr, n)
-                return self._addresses[i]
-        else:
-            raise MemoryError("Address to realloc not found in pool")
-
-
-cdef class Address:
-    def __cinit__(self, size_t number, size_t size):
-        cdef void* addr = PyMem_Malloc(number * size)
-        memset(addr, 0, number * size)
-        self.addr = <size_t>addr
-
-    def __dealloc__(self):
-        PyMem_Free(<void*>self.addr)