Updated example requests

Backend-libXML/sample/xpath/non-ns.curl

@@ -2,4 +2,3 @@
 url = "localhost:5000/xpath"
 request = "POST"
 data = "@data.json"
-header = "Content-Type: application/json"

Backend-libXML/sample/xpath/ns.curl

@@ -2,4 +2,3 @@
 url = "localhost:5000/xpath"
 request = "POST"
 data = "@dataNS.json"
-header = "Content-Type: application/json"

Backend-libXML/sample/xsd/xsd.curl

@@ -1,5 +1,4 @@
 #url = "http://localhost:8082/xsd"
 url = "http://localhost:5000/xsd"
 data = "@xsd.json"
-header = "Content-Type: application/json"
 request = POST

Backend-libXML/sample/xslt/xslt.curl

@@ -1,4 +1,3 @@
 url = "http://localhost:5000/xslt"
 data = "@xslt.json"
-header = "Content-Type: application/json"
 request = POST