fix: don't flush env between requests (#1814)

internal/phpheaders/phpheaders_test.go

@@ -1,23 +0,0 @@
-package phpheaders
-
-import (
-	"net/http/httptest"
-	"testing"
-
-	"github.com/stretchr/testify/assert"
-)
-
-func TestAllCommonHeadersAreCorrect(t *testing.T) {
-	fakeRequest := httptest.NewRequest("GET", "http://localhost", nil)
-
-	for header, phpHeader := range CommonRequestHeaders {
-		// verify that common and uncommon headers return the same result
-		expectedPHPHeader := GetUnCommonHeader(header)
-		assert.Equal(t, phpHeader+"\x00", expectedPHPHeader, "header is not well formed: "+phpHeader)
-
-		// net/http will capitalize lowercase headers, verify that headers are capitalized
-		fakeRequest.Header.Add(header, "foo")
-		_, ok := fakeRequest.Header[header]
-		assert.True(t, ok, "header is not correctly capitalized: "+header)
-	}
-}