Clean up Morphology imports and definitions (#7441)

* Clean up Morphology imports and definitions

* Whitespace formatting

spacy/morphology.pxd

@@ -1,14 +1,11 @@
 from cymem.cymem cimport Pool
-from preshed.maps cimport PreshMap, PreshMapArray
-from libc.stdint cimport uint64_t
-from murmurhash cimport mrmr
+from preshed.maps cimport PreshMap
 cimport numpy as np
+from libc.stdint cimport uint64_t
 
-from .structs cimport TokenC, MorphAnalysisC
+from .structs cimport MorphAnalysisC
 from .strings cimport StringStore
-from .typedefs cimport hash_t, attr_t, flags_t
-from .parts_of_speech cimport univ_pos_t
-from . cimport symbols
+from .typedefs cimport attr_t, hash_t
 
 
 cdef class Morphology:
@@ -16,14 +13,6 @@ cdef class Morphology:
     cdef readonly StringStore strings
     cdef PreshMap tags # Keyed by hash, value is pointer to tag
 
-    cdef public object lemmatizer
-    cdef readonly object tag_map
-    cdef readonly object tag_names
-    cdef readonly object reverse_index
-    cdef readonly object _exc
-    cdef readonly PreshMapArray _cache
-    cdef readonly int n_tags
-
     cdef MorphAnalysisC create_morph_tag(self, field_feature_pairs) except *
     cdef int insert(self, MorphAnalysisC tag) except -1
 

spacy/morphology.pyx

@@ -1,20 +1,11 @@
 # cython: infer_types
-from libc.string cimport memset
-
-import srsly
-from collections import Counter
 import numpy
 import warnings
 
-from .attrs cimport POS, IS_SPACE
-from .parts_of_speech cimport SPACE
-from .lexeme cimport Lexeme
+from .attrs cimport POS
 
-from .strings import get_string_id
-from .attrs import LEMMA, intify_attrs
 from .parts_of_speech import IDS as POS_IDS
-from .errors import Errors, Warnings
-from .util import ensure_path
+from .errors import Warnings
 from . import symbols