Build:Tests: Fix custom build tests, verify on Travis

This commit fixes unit tests for the following builds:

1. The no-deprecated build: `custom:-deprecated`
2. The current slim build: `custom:-ajax,-effects`
3. The future (#4553) slim build: `custom:-ajax,-callbacks,-deferred,-effects`

It also adds separate Travis jobs for the no-deprecated & slim builds. 

Closes gh-4577

1 files changed, 0 insertions, 24 deletions

diff --git a/src/ajax/parseXML.js b/src/ajax/parseXML.js
deleted file mode 100644
index d547eab53..000000000
--- a/src/ajax/parseXML.js
+++ /dev/null
@@ -1,24 +0,0 @@
-import jQuery from "../core.js";
-
-// Cross-browser xml parsing
-jQuery.parseXML = function( data ) {
-	var xml;
-	if ( !data || typeof data !== "string" ) {
-		return null;
-	}
-
-	// Support: IE 9 - 11+
-	// IE throws on parseFromString with invalid input.
-	try {
-		xml = ( new window.DOMParser() ).parseFromString( data, "text/xml" );
-	} catch ( e ) {
-		xml = undefined;
-	}
-
-	if ( !xml || xml.getElementsByTagName( "parsererror" ).length ) {
-		jQuery.error( "Invalid XML: " + data );
-	}
-	return xml;
-};
-
-export default jQuery.parseXML;