setup.py fixup, closes #19467 (#19472)

Author: jbrockmendel

setup.py

@@ -416,7 +416,7 @@ def get_tag(self):
     cmdclass['build_src'] = DummyBuildSrc
     cmdclass['build_ext'] = CheckingBuildExt
 
-lib_depends = ['reduce', 'inference']
+lib_depends = ['inference']
 
 
 def srcpath(name=None, suffix='.pyx', subdir='src'):
@@ -508,11 +508,12 @@ def pxd(name):
         'sources': ['pandas/_libs/src/parser/tokenizer.c',
                     'pandas/_libs/src/parser/io.c']},
     '_libs.reduction': {
-        'pyxfile': '_libs/reduction'},
+        'pyxfile': '_libs/reduction',
+        'pxdfiles': ['_libs/src/util']},
     '_libs.tslibs.period': {
         'pyxfile': '_libs/tslibs/period',
         'pxdfiles': ['_libs/src/util',
-                     '_libs/lib',
+                     '_libs/missing',
                      '_libs/tslibs/timedeltas',
                      '_libs/tslibs/timezones',
                      '_libs/tslibs/nattype'],