Specify python3.8-embed pkg-config and remove functions no longer in python 3.8

high_level_layer.go

@@ -8,7 +8,7 @@ Copyright 2018 Datadog, Inc.
 package python3
 
 /*
-#cgo pkg-config: python3
+#cgo pkg-config: python-3.8-embed
 #include "Python.h"
 */
 import "C"

thread.go

@@ -48,11 +48,6 @@ func PyThreadState_Swap(tstate *PyThreadState) *PyThreadState {
 	return (*PyThreadState)(C.PyThreadState_Swap((*C.PyThreadState)(tstate)))
 }
 
-//PyEval_ReInitThreads : https://docs.python.org/3/c-api/init.html#c.PyEval_ReInitThreads
-func PyEval_ReInitThreads() {
-	C.PyEval_ReInitThreads()
-}
-
 //PyGILState_Ensure : https://docs.python.org/3/c-api/init.html#c.PyGILState_Ensure
 func PyGILState_Ensure() PyGILState {
 	return PyGILState(C.PyGILState_Ensure())

thread_test.go

@@ -6,15 +6,6 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
-func TestThreadInitialization(t *testing.T) {
-	Py_Initialize()
-	PyEval_InitThreads()
-
-	assert.True(t, PyEval_ThreadsInitialized())
-
-	PyEval_ReInitThreads()
-}
-
 func TestGIL(t *testing.T) {
 	Py_Initialize()
 	PyEval_InitThreads()