Revert "Fix #11586. Ajax DELETE ain't got no body, so data goes to its URL."

This reverts commit c01e022f.

We actually changed DELETE to accept a body on purpose, see http://bugs.jquery.com/ticket/7285 .

src/ajax.js

@@ -7,7 +7,7 @@ var // Document location
 	rheaders = /^(.*?):[ \t]*([^\r\n]*)\r?$/mg, // IE leaves an \r character at EOL
 	// #7653, #8125, #8152: local protocol detection
 	rlocalProtocol = /^(?:about|app|app\-storage|.+\-extension|file|res|widget):$/,
-	rnoContent = /^(?:GET|HEAD|DELETE)$/,
+	rnoContent = /^(?:GET|HEAD)$/,
 	rprotocol = /^\/\//,
 	rquery = /\?/,
 	rscript = /<script\b[^<]*(?:(?!<\/script>)<[^<]*)*<\/script>/gi,

test/unit/ajax.js

@@ -840,21 +840,6 @@ test("jQuery.ajax - HEAD requests", function() {
 
 });
 
-
-test("jQuery.ajax - DELETE requests", function() {
-	expect(1);
-
-	jQuery.ajax({
-		url: "devo.html",
-		type: "DELETE",
-		data: { "whip": "it", "qty": "good" },
-		beforeSend: function( _ , s ) {
-			equal( s.url, "devo.html?whip=it&qty=good", "Delete requests encode data in URL" );
-			return false;
-		}
-	});
-});
-
 test("jQuery.ajax - beforeSend", function() {
 	expect(1);
 	stop();