Replace cpdef variables with cdef (#7834)

spacy/kb.pxd

@@ -28,7 +28,7 @@ cdef class Candidate:
 
 cdef class KnowledgeBase:
     cdef Pool mem
-    cpdef readonly Vocab vocab
+    cdef readonly Vocab vocab
     cdef int64_t entity_vector_length
 
     # This maps 64bit keys (hash of unique entity string)

spacy/tokenizer.pxd

@@ -14,7 +14,7 @@ cdef class Tokenizer:
     cdef Pool mem
     cdef PreshMap _cache
     cdef PreshMap _specials
-    cpdef readonly Vocab vocab
+    cdef readonly Vocab vocab
 
     cdef object _token_match
     cdef object _url_match

spacy/vocab.pxd

@@ -25,12 +25,12 @@ cdef struct _Cached:
 
 cdef class Vocab:
     cdef Pool mem
-    cpdef readonly StringStore strings
-    cpdef public Morphology morphology
-    cpdef public object vectors
-    cpdef public object _lookups
-    cpdef public object writing_system
-    cpdef public object get_noun_chunks
+    cdef readonly StringStore strings
+    cdef public Morphology morphology
+    cdef public object vectors
+    cdef public object _lookups
+    cdef public object writing_system
+    cdef public object get_noun_chunks
     cdef readonly int length
     cdef public object data_dir
     cdef public object lex_attr_getters